Malicious PDF — malware analysis report

Static analysis result for SHA-256 817043e42be6d36d…

MALICIOUS

PDF

78.8 KB Created: 2021-03-24 03:08:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3bff5e56e0db32dde7f542ffecab7732 SHA-1: d45e39219b91136d07ccdb2f70dec87aa2bd264c SHA-256: 817043e42be6d36d6455f3e7f9209187247d67d72276340d5a8cd378ed5ee73d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely intended to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a search query.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://fokemale.ru/award?keyword=arsenic+and+old+lace+play+pdf PDF link annotation
    • https://cdn.sqhk.co/kegetaxob/kii9Ogc/tetupa.pdfIn PDF document text
    • https://cdn.sqhk.co/xosuridasago/eihicZD/dragons_titan_uprising_how_to_get_toothless.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404313/normal_602797794dd36.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/JifyN8G/nezawezad.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jejcUge/pakafikezezadesafok.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/7ajaje9/fekulunigav.pdfIn PDF document text
    • http://piguniw.22web.org/fluke_1550b_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_6053e272647e3.pdfIn PDF document text
    • https://cdn.sqhk.co/mawedabe/Dt5bij1/short_stories_in_english_olly_richards.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/ZheggQB/recharge_your_metro_card_paytm.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/Rbibzja/summer_pockets_guide_steam.pdfIn PDF document text
    • http://jufidozotazi.66ghz.com/betiza.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/dif5S26/79732752352.pdfIn PDF document text
    • https://cdn.sqhk.co/suwojixuwebi/GPNUWjf/35111100562.pdfIn PDF document text
    • http://retafap.22web.org/capitalism_socialism_and_democracy_1942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455180/normal_601d53dc6158e.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/E2Widje/jump_on_it_utah_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/NTMI4je/sodujava.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zomuzigo/vijawizironifav.pdfIn PDF document text
    • http://vojakevid.epizy.com/agricultural_science_focus_textbook_grade_12_download.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/academic_reading_test_15_answers.pdfIn PDF document text
    • http://roradom.epizy.com/tusigutomiludawuje.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/what_are_the_two_reactants_needed_for_aerobic_respiration.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA04 4948 bytes
SHA-256: 153c0014c7bb9e94646c3c1eef427300450dae17cb6b959081382baa3f9bec26
font_01_sfnt_off0000fadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADD 10844 bytes
SHA-256: 9df750d8dff672fb081fd785d296f546ae2da233c4cfdc6eb74767987225e6ab
font_02_sfnt_off00011fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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