Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc3ab11380e4a5e…

MALICIOUS

PDF

66.9 KB Created: 2021-01-07 20:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2504a59a7e18f44d9d07d92674e4efce SHA-1: 7d36384910bb8fa68efb829fb9484bb5130bc786 SHA-256: bfc3ab11380e4a5ec76f2ff9876b4f52b615dd49af79d11667a9d34c396351ce
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. This URL is likely used to redirect users to a phishing site or to download a secondary payload. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?utm_term=columbia+county+ny+real+estate+agents In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f92c14197a7b.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/U7XZmxk/impossible_road_best_score.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414677/normal_5fa2ce582c268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_5f90def331d86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f875656b60b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5fe9a1aae6146.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446263/normal_5f9d9240d52ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387241/normal_5fca5b463a743.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/20887b0a-8b66-4b59-af3d-14b13fa48c5c/indonesia_business_outlook_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d7090a-003d-4e97-a9b3-7c4165fc08be/victoria_2_cold_war_enhancement_tags.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/forge_of_empires_guide_negotiate.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/bcbs_medicaid_medication_prior_authorization_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f4ba88-1c98-4cee-b8fb-b826398cb330/darnified_ui_new_vegas_fonts.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_off0000c8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F0 5268 bytes
SHA-256: 63f53af549b2c6a6ce2a3f207941ec130a95f1b069a9737ac27e99b886775b06
font_01_sfnt_off0000dac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 10868 bytes
SHA-256: bfdb2dd7195d62e8e6d68e0106aa0e1fbfacd7bfc9983fe329dc3a92da7409c5

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