Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da144a05792293f…

MALICIOUS

PDF

154.3 KB Created: 2020-11-19 21:01:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d53a760e082fab4e2f6be3b9c8c14b30 SHA-1: 2b09452854e2b61c46d8686b78af185db1e06a42 SHA-256: 5da144a05792293f5e8d35431becaab02ddd5d5f8e96e1adf381ce56be3df925
162 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'https://traffmen.ru/strik?utm_term=megan+meade%2527s+guide+to+the+mcgowan+boys'. This, combined with ML classification and ClamAV detection, strongly indicates malicious intent. The document body, though heavily obfuscated, appears to be a lure, possibly related to a guide, which is common in phishing campaigns delivered via email attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=megan+meade%2527s+guide+to+the+mcgowan+boys In PDF document text
    • https://sesejeku.weebly.com/uploads/1/3/4/4/134495796/mefezikij-baxubaxozurol-mazeresezapujo-naforisemumeko.pdfIn PDF document text
    • https://bofezukidev.weebly.com/uploads/1/3/4/4/134464138/f425b00b3514bd3.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/fikebigaromasifakuf.pdfIn PDF document text
    • https://sekojeti.weebly.com/uploads/1/3/4/5/134583019/lebuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f896c5b6a72a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468253/normal_5fa9b94ba7a02.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/fosagoba/leatherworking_guide_bfa_1-_300.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/geological_formation_definition_science.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/vovotopafadeb.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/gogila.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/57828743265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9abc36e5-cacb-4d7f-8e11-065e54b9d6cf/usa_network_activate_bcu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06da12c4-eb1d-4835-8904-4a9b7bd2a580/pusivefasolepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3c8e32-6fac-4b13-9830-026e142737cd/25361734758.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_off00022448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22448 5596 bytes
SHA-256: 9549d34e705b89a88832215dc9d16305223a9b99600d7dc1d312f9eb2aea9ec1
font_01_sfnt_off00023761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23761 10520 bytes
SHA-256: b0cb2e4d35093c78f901117a022afe98debc20e6cb435d2965f5d3324f2891e1

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