Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f3d00ff3d8071d…

MALICIOUS

PDF

73.1 KB Created: 2021-01-22 17:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 34fd16cb2320f22a0b1eb62de611e0b3 SHA-1: e84013f6d4a2b7091a1246016cacea557b17f443 SHA-256: 49f3d00ff3d8071deba3c910588d8ffeee4857fb220ed2a7924746bb288e27e4
104 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 ML classifiers and ClamAV, specifically flagged as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'bulk trash pickup fort lauderdale' and an embedded URI pointing to 'trafffe.ru', suggesting a phishing lure. The presence of an external URI and the urgency lure heuristic indicate an attempt to direct the user to a malicious site for further compromise.

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
  • 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
  • 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://trafffe.ru/123?utm_term=bulk+trash+pickup+fort+lauderdale PDF link annotation
    • https://cdn.sqhk.co/verexoleki/gcNkPig/most_popular_party_games_of_all_time.pdfIn PDF document text
    • https://cdn.sqhk.co/jijasitov/evZ3Vp5/xuxikedi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484993/normal_6004afbac6328.pdfIn PDF document text
    • https://sokepubin.weebly.com/uploads/1/3/5/3/135391759/3acde4.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/5108648.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/dhaUPib/46509616141.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420037/normal_6002631162df0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501659/normal_5ff2034cd2298.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459922/normal_5fce97b628523.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/gWhjWK4/tip_report_2019_laos.pdfIn PDF document text
    • https://cdn.sqhk.co/kafevinuva/bjhhfji/gejivudobozale.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/8gjUjgr/vosulopokikub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5fc87235dedd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vijijowop.epizy.com/notalobenapupegawivu.pdfIn PDF document text
    • http://ropobowex.epizy.com/coulson_and_richardson_volume_7.pdfIn PDF document text
    • http://nasuxenabo.epizy.com/meaning_of_academic_performance.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_off0000df55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF55 5356 bytes
SHA-256: f818287d7a951f971565300b29518c3945e02bb9168c9c7e93196e58e792e815
font_01_sfnt_off0000f187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF187 11044 bytes
SHA-256: 7f30f29e809e20b0501c4273c9fccecb754eab8887cb333fba08d3512b7b3146

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