Malicious PDF — malware analysis report

Static analysis result for SHA-256 879ddac2f9b6afdb…

MALICIOUS

PDF

65.2 KB Created: 2020-12-18 12:15:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 16ff3a29c5076b6d684b103552894d65 SHA-1: 4a788439f1d49265252471177b851fd95e48bb38 SHA-256: 879ddac2f9b6afdbba0277a54be4f730fa9124e035bdec12c1d51f67477501de
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. The embedded URL 'https://traffnew.ru/123?utm_term=frsc+act+2007+pdf' strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI indicate an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://traffnew.ru/123?utm_term=frsc+act+2007+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492250/normal_5fca623940180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502493/normal_5fabd7c316758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f993cba5d0ef.pdfIn PDF document text
    • https://momigetufi.weebly.com/uploads/1/3/4/8/134876151/d4c03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5fd67873b87f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465010/normal_5fd063c42bf73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5fad83fd6c4c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f87c57ad2f17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/centre_eden_formation_avis.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_off0000c458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC458 5428 bytes
SHA-256: 12743f3a6627fe9dd311989bc5c4bfbfb792815ba63254746827951acd900de9
font_01_sfnt_off0000d6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E3 9880 bytes
SHA-256: d863221a28c957273ada813fa5d9a465caac7853198e475b06b1b82d3f0b94bb

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