Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d07481f077e3be2…

MALICIOUS

PDF

73.0 KB Created: 2020-12-23 23:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 43a88caab0e7a8120595ca6e9b4258c8 SHA-1: 77d2dd7c9cd6336dc51f1e07f715a84ba12e8e33 SHA-256: 9d07481f077e3be27bac315d640732ff810246f9a77f3d49c7077a38488a8c65
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. The document body, though heavily obfuscated, contains text related to 'mountain bike pedals for sale gumtree', suggesting a lure. An embedded URI points to 'traffking.ru', likely a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/strik?utm_term=mountain+bike+pedals+for+sale+gumtree PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376125/normal_5fb742650eb16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_5fa1c1c5cdad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5fbf4fc7ba614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_5fd2e7b0dce03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393197/normal_5f90d649b2e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484639/normal_5fc36b61d6375.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374979/normal_5fcdd74e1a521.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/f82fc3ab-c53e-4372-b41f-26e5b952cb09/kadibifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed9ae72d-d1e6-4e6f-8f96-b401109846df/80434223747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3effb14c-059c-4ff6-92a5-dd4c57da3f4b/tefelupurafepukowidiz.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/24528735373.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_off0000e207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE207 5568 bytes
SHA-256: 7b56884d5c125b938bfd316b10e33ab7a04b6f60801046e1cfdb4a96bb799d2a
font_01_sfnt_off0000f4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4ED 9984 bytes
SHA-256: 4921ec1e45b0f3a98628c06ff1701ce54ec7e9ee9585fa5a5f73b3be2ce2e81c