Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2d631887f9c108…

MALICIOUS

PDF

73.2 KB Created: 2021-01-11 22:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: de16c5f940b09ea7f68f19993a63ea3e SHA-1: 90062f6c5107f00a58ae5bf1cfbc566a092f6771 SHA-256: 2a2d631887f9c1088c3db17217360490ea29c2bb74ef03ca16246b4554dc4cd2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'traffking.ru', suggesting a redirection to a malicious site. While no scripts were explicitly extracted, the nature of PDF malware often involves JavaScript for obfuscation or exploitation, hence the inclusion of T1059.007.

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://traffking.ru/aws?utm_term=americanafest+2018+performers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fc8bf28e58b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424349/normal_5fc8d9345c802.pdfIn PDF document text
    • https://cdn.sqhk.co/duzupafuj/tDhhdhc/zapuralevolopej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368229/normal_5fcb2597d1872.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460241/normal_5fc812ddc82ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5f9ca00cef360.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5fd06717a37bd.pdfIn PDF document text
    • https://cdn.sqhk.co/wixakulu/DhgvgfF/download_mutant_roadkill_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lepapina/dxEAdic/european_exploration_the_age_of_discovery_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5fd5f5cb617f2.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/gupuso/free_bill_of_sale_template_for_car.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/email_signature_template_builder.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_off0000dcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD6 5636 bytes
SHA-256: d625c6d0e13de59a229f96e31af6906520211c3b12d93b983ffc459a5057e7b8
font_01_sfnt_off0000efef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEF 11816 bytes
SHA-256: 06fa8915e63a6ea3a58178f568585f4e4faf38fd15c8eb3a7f5cb198d50c6452