Malicious PDF — malware analysis report

Static analysis result for SHA-256 6379c3185708f375…

MALICIOUS

PDF

69.3 KB Created: 2020-12-25 21:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 637c3f4f968f2d0f7e3ecfcf1725f528 SHA-1: 05e465b796ca6d0391bb1b62e935d2840bf475c8 SHA-256: 6379c3185708f37516ac9a13a627723ef8c8e74f7498d2ab62625f390801c705
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI pointing to 'trafffe.ru' was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URL indicate a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafffe.ru/strik?utm_term=weekend+warriors+mma+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425005/normal_5fb56eb5ac90d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392193/normal_5fb4e4d21db83.pdfIn PDF document text
    • https://cdn.sqhk.co/midusuworab/jgheidM/tuzoxipunerukesepatete.pdfIn PDF document text
    • https://cdn.sqhk.co/sirazisiluz/dmjhZgj/average_cost_medicare_part_d_premium.pdfIn PDF document text
    • https://cdn.sqhk.co/parapirer/ePhesjj/kavepero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5fdbdfafefdca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5fa314f1922a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413454/normal_5fbeeeaddb6b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417305/normal_5f9fe6c171352.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/dgdohfz/adorable_home_kitchen_design.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384310/normal_5f9b5aca79b58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476766/normal_5fc7996619325.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/45d9aa47-27cb-4253-af29-8070477ee88e/onde_estou_ou_aonde_estou.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_off0000d2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EB 5284 bytes
SHA-256: 6e2e4235109859fbcb9b78e26f69cfe41e532e3b6bafb75add38bb6531fb3578
font_01_sfnt_off0000e4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E9 10492 bytes
SHA-256: 114b2e328cc92eb49519b7594f30bb284076658ff58e0e9939d26475fa386c82