Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc92a3cda2658bd2…

MALICIOUS

PDF

67.2 KB Created: 2020-11-26 08:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6840e35c17406ae52fc15c81fa4299d7 SHA-1: dcc89d83b23db3943b86c0d7bac2edba9bf9e56d SHA-256: dc92a3cda2658bd281cb092f39e27ae399c6920f94568de848bd373f5c941f49
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, specifically 'https://trafffe.ru/strik?utm_term=coos+county+registry+of+deeds+lancaster+nh'. This URL is likely part of a phishing attempt to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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
  • 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/strik?utm_term=coos+county+registry+of+deeds+lancaster+nh PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5f9b924144ee5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f98dc8859ccc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5f8dafd507b14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f888952960e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f9d2b320f1ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f93c104dadd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476150/normal_5fa96da375608.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/32ab80d5-16c3-44e8-98f6-40b7255c087c/thing_thing_arena_3_hacked_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/63387201015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfbf0eb5-8b0f-4943-8675-1cf8e7212a75/warum_hat_hardi_pietsmiet_verlassen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2055fa7d-1f0f-4084-8f96-0a1d2b07b886/saxorenunoxagilirof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3a1cc47-d216-4fe2-a359-b3f6c4a4fbe0/74678867273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de49d236-0ec9-4117-a828-0e0facd6f2b2/tojugojer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b851da-7ba5-4c39-94dd-0fcd80c97b79/47858135723.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_off0000ca41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA41 5288 bytes
SHA-256: 416e3fbfc209097417bbfe8c171a81ada68faa20d4578a92a33e97ad623baaa8
font_01_sfnt_off0000dc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3B 10532 bytes
SHA-256: a4d830c6a9235d746b77377e4bf3133788ab43cd2f45369e8fac474c1bb9604f

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