Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fee9bd1f3c80822…

MALICIOUS

PDF

83.7 KB Created: 2021-03-14 16:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0a2c68d98d13caa835752c59efdcc0d8 SHA-1: c0cfdeccf3af651e5a00acd20d5bd119a7362e11 SHA-256: 5fee9bd1f3c80822188a4ddde2e6abe5e315dee3fb2c9b0ec3092f3986738185
244 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many of which point to disposable domains and appear to be part of a link farm, suggesting a phishing or SEO manipulation scheme. The presence of a link to a known malicious redirector further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/123?utm_term=boer+war+uniforms+british In PDF document text
    • http://chambrehub.xyz/interchange_1_fourth_edition_workbook_resueltoiu2zd.pdfIn PDF document text
    • http://telemprom.xyz/mopetovapijigogprbnw.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/561e5.pdfIn PDF document text
    • http://moreprodukti.com/mopavulesedabizonifejusaradbd.pdfIn PDF document text
    • https://fejilezujew.weebly.com/uploads/1/3/4/3/134340931/naxojenedig.pdfIn PDF document text
    • https://begaraga.weebly.com/uploads/1/3/4/6/134652864/fce5052106.pdfIn PDF document text
    • https://mivodijabid.weebly.com/uploads/1/3/4/7/134732330/wizusa_filam_pebazepawizig.pdfIn PDF document text
    • https://livuwijonirib.weebly.com/uploads/1/3/4/7/134732661/deda961ed18859.pdfIn PDF document text
    • https://cdn.sqhk.co/noremixujor/ficvQhd/verimi.pdfIn PDF document text
    • https://kawotubizon.weebly.com/uploads/1/3/1/8/131871780/185219.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxogife/18hagfL/reckless_getaway_2_mod_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_6029a763830b1.pdfIn PDF document text
    • https://nelolepi.weebly.com/uploads/1/3/4/3/134355236/828654.pdfIn PDF document text
    • https://xuvamedinomu.weebly.com/uploads/1/3/5/3/135392700/rotosejipixubakar.pdfIn PDF document text
    • https://subafoxa.weebly.com/uploads/1/3/1/3/131379179/vopon_dazatexubaredo_xopemo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_5fd30d728a401.pdfIn PDF document text
    • https://vedefagam.weebly.com/uploads/1/3/0/8/130814874/b5742cba.pdfIn PDF document text
    • https://cdn.sqhk.co/butofelo/wjiScet/wogopiwisodabomavilusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_6026992d510d5.pdfIn PDF document text
    • http://mavito.online/app_store_free_for_macw2ibp.pdfIn PDF document text
    • http://subbellassecret.com/bivabegunakunag7wuje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e772f6-c924-46bd-b777-88b17efc498b/36615082388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0b3715-f79d-4d87-b2e8-1bcf4092fe36/kegojofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30ddd2a-9c11-44dd-b2bd-a345421c2c68/92335347721.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDB 5256 bytes
SHA-256: fbaa76811fda0ff58b3a72aa50e6cde86c654284989f8bc82d2f30378d3050cd
font_01_sfnt_off00011da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA6 10464 bytes
SHA-256: f16190d274dab4e867486feb281c9316fe096a5a90c90db5ac0b768149faf830