Malicious PDF — malware analysis report

Static analysis result for SHA-256 f151545cf1002ee0…

MALICIOUS

PDF

112.2 KB Created: 2021-03-20 19:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8826637b44f124201fd42b9de78b4732 SHA-1: 25a00e808577a19c73fc01d6b4289ea9f39a42cb SHA-256: f151545cf1002ee0f6b2dd40e51128d1a47237acecf71263eadc927ed4942aa1
304 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits multiple critical heuristic firings indicating malicious intent, including brand-impersonation credential phishing and redirection to known malicious infrastructure. The presence of numerous external links, many hosted on disposable domains, suggests a link farm designed to distribute phishing lures. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with a phishing campaign aiming to trick users into revealing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9869

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://tiwoboromezusud.weebly.com/uploads/1/3/0/8/130874009/titojogologifoje.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/award?keyword=sri+kalabhairava+ashtakam+lyrics+in+telugu+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4481673/normal_5fc6ac2e62095.pdfIn PDF document text
    • https://tiwoboromezusud.weebly.com/uploads/1/3/0/8/130874009/titojogologifoje.pdfIn PDF document text
    • https://kipejuxi.weebly.com/uploads/1/3/2/6/132682137/limivirujafu.pdfIn PDF document text
    • https://cdn.sqhk.co/wisivelu/Zginjf4/captions_for_photos_with_friends_christmas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379611/normal_5fd05532d59c4.pdfIn PDF document text
    • https://gazulaloruvuv.weebly.com/uploads/1/3/4/6/134693071/9c4da882a5be.pdfIn PDF document text
    • https://kesevure.weebly.com/uploads/1/3/4/4/134497963/2c334581.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/gcxwja9/watch_black_christmas_movie_2019_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385634/normal_6003b012e14b0.pdfIn PDF document text
    • https://cdn.sqhk.co/siloneza/gfthfjy/what_song_do_you_like.pdfIn PDF document text
    • https://cdn.sqhk.co/dopiporajen/bihdiiY/run_3d_cool_math_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407991/normal_6012982b5906c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_71cea16ccf4c427696645b39883112ef.pdf?index=trueIn PDF document text
    • http://sejozewixexoba.rf.gd/queen_elizabeth_guards_uniform.pdfIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_46b51c0cb2ae4ac7beda2fbe4d5dcbf2.pdf?index=trueIn PDF document text
    • http://wokoxab.epizy.com/death_note_misa_amane_lifespan.pdfIn PDF document text
    • http://gukupexokopiwug.epizy.com/financial_accounting_mcqs_with_answers_doc.pdfIn PDF document text
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_ddc9187c8d3b4e7aa5a0cb784bc27d66.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b957a2ac-81dc-48d8-8f53-25c444df4990/diurnal_motion_celestial_sphere.pdfIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_e5f06d707a2743efad13d7b36be5f5cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/31be5334-1d77-492e-8629-675f65e952ad/how_well_do_brita_water_bottles_work.pdfIn PDF document text
    • http://zanobunu.epizy.com/tema_yowhatsapp_ios_11_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf657d87-ce2f-44ca-af54-b7fa6faadda9/fisategixologimotira.pdfIn PDF document text
    • https://cdd249b8-77b1-4a94-b024-8995efe4d959.filesusr.com/ugd/d394ff_72bb1f276e8743d8b54bcd4f75a3fee3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6706c6e-9203-45bd-88d2-3b3ff2deb524/what_oil_filter_does_a_5.7_hemi_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b327d6b-1861-4def-a1e2-0ac9531d5bf9/how_to_make_sparkling_water_without_a_machine.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF903 6036 bytes
SHA-256: d6a3df45cce00d6e853159899f737701d743f4e5907930e9c4fbd761d14102e9
font_01_sfnt_off00010d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D73 3772 bytes
SHA-256: b850e935aaf604f3e1824861b6c46746957ce6d0e1401f4bf16d070b42224529
font_02_sfnt_off00011915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11915 51344 bytes
SHA-256: 7d21689eed00c72a3ec313effc7ad3fc457d84a2b7f99cfe812975e147684a07
font_03_sfnt_off00017bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BF2 11480 bytes
SHA-256: 778c279b6d1a59ccd8e2cb003081f925b429a5da30b457c43e9291370e85b9af
font_04_sfnt_off0001a1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1A9 3388 bytes
SHA-256: a1284d87c1e55d7d9288b104a7140e542a35152d2956b1dea31c506b17240f59

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