Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf9a8f00941d0a1…

MALICIOUS

PDF

76.5 KB Created: 2020-11-29 15:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c9c27ba9ee8a6a024719f5a5e3150497 SHA-1: 893128e54177a4af74f2a876d2fadd72d012913d SHA-256: bbf9a8f00941d0a1146fcb70c91b9128f6af5edbe64c68fa791f764e5a5a210d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, characteristic of a link farm or phishing lure, with one primary URL being traffitec.ru. ClamAV and ML classifiers identified this PDF as malicious, specifically flagging it as a phishing trojan. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafftec.ru/strik?utm_term=vehicle+sales+agreement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5f8914b610a82.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/d1b716f8e.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/d2ed8d8fa88d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469824/normal_5fa8f81cf3a06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_5fa02985e7daf.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/9400731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476751/normal_5fadf28f7cc96.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/11a57cf4-8ae3-4c27-93d4-237b76b412c1/10.snf_biyoloji_test_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bbdee18-f141-4216-808c-a69975f87d58/15837_s_crenshaw_blvd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8b70d6-d133-4b95-9fe3-08cce15160d0/solitaire_chess_game_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4af0128-478e-462e-9554-b4505eaccef0/nudaripojatemof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d298d803-05d2-464a-9726-f1e276834e70/private_school_mod_sims_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b2d698-74fb-49a2-8f8e-c2c590f3fe26/case_hardening_methods.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_off0000eec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC5 5180 bytes
SHA-256: 001dd217b4d1dde86836e18a35583a32c4c16525a80a7f8d3279ce5fd7f169ea
font_01_sfnt_off00010041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10041 10916 bytes
SHA-256: 486708e565c06945ddc30c54bf58ed2f67faafcfc9f112dd88ec46bc0522f4fd

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