Malicious PDF — malware analysis report

Static analysis result for SHA-256 b52a480adf688b4d…

MALICIOUS

PDF

78.4 KB Created: 2021-01-11 20:20:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f09b0537b30ee949c44f1143f2ec9bdb SHA-1: 7536f14f5f66838f59960eaa5e3ef641f2b70140 SHA-256: b52a480adf688b4d8e4dc92d67093ea7438c79fd3e2344d229efad94fa15e337
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. This indicates the document is designed to lead the user to a phishing or malicious website. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=guardian+property+management In PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/O6CujgL/eggplant_boats_with_shrimp.pdfIn PDF document text
    • https://site-1193774.mozfiles.com/files/1193774/79354452197.pdfIn PDF document text
    • https://cdn.sqhk.co/zixapegof/ifijEKH/regaragafejobutowojujilu.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/h7iWDhc/us_civil_war_battle_1862_in_tennessee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5fb50060748d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486745/normal_5fcb69f149daf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382976/normal_5ff9ca9fe9893.pdfIn PDF document text
    • https://site-1176972.mozfiles.com/files/1176972/norigomuduruzewipimugoti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417670/normal_5fec8766dd17e.pdfIn PDF document text
    • https://site-1171394.mozfiles.com/files/1171394/turbo_card_reload_fee.pdfIn PDF document text
    • https://site-1175994.mozfiles.com/files/1175994/the_oregon_trail_settler_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F2 5200 bytes
SHA-256: a3c79c4d5ae9bc2a2be33f633d2ea5e2982b9ae79b7cca76ff9a00f56685ec76
font_01_sfnt_off00010797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10797 11132 bytes
SHA-256: 0e71c87e48dbb4792058f872804b6fe03cea4a84f2091688d666f020888674c7

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