Malicious PDF — malware analysis report

Static analysis result for SHA-256 434d67b02091732d…

MALICIOUS

PDF

108.2 KB Created: 2021-01-16 04:58:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4ebb7c23af6e7d7095c9ba0b9340fb3d SHA-1: b5293397e2c8e90819c85f797dddf2cd3c7d2233 SHA-256: 434d67b02091732ddeba3c2968775537b17bc5a8bdb8f07f586365530a069b86
96 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a ClamAV detection and an ML classifier. It contains an embedded external URI pointing to 'trafffe.ru', likely a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious resource, consistent with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/123?utm_term=nova+planet+of+the+apes+images PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444115/normal_5fbeb2fb4b7be.pdfIn PDF document text
    • https://wokugosag.weebly.com/uploads/1/3/4/3/134339956/2031cfd3bd7020.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/ohbjehc/wow_free_stuff_usa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445877/normal_5fbd5fcede62c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379229/normal_5ff163da5f237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_5fe0c716e4e11.pdfIn PDF document text
    • https://cdn.sqhk.co/kekumumaxow/3EjgPjd/a_smile_is_beautiful.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490369/normal_5ff8933e00c24.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/bakoloj/luzisixabuvisisazem.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/id_passport_photo_maker_cracked_apk.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_off00015ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BA7 5036 bytes
SHA-256: 99ac9abb220c6942a9afb0a29c460af5c95e8c96841ac1919abdfa666a3e63d6
font_01_sfnt_off00016cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CAE 12868 bytes
SHA-256: 6436dea88985ce423b544443ad9bc9df04537bb5d75448c73450e09e51f30c93
font_02_sfnt_off000195fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195FD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176