Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70d76c21d159589…

MALICIOUS

PDF

64.7 KB Created: 2020-12-14 03:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 56c8b3563acc6f773621f1ee80bdf862 SHA-1: 1e9b37536423dcab583298d623fb473603b2e812 SHA-256: e70d76c21d15958934a30831d30024722ce09ec69332252f3aa18be696907d0e
104 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'trafffi.ru' and a heuristic firing for a 'download button' lure suggest a phishing or malware distribution attempt. Although no scripts were extracted, the overall context points to a malicious PDF designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/123?utm_term=gears+of+war+3+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5f8c589354f53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453108/normal_5fc0db3cd0cb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402000/normal_5f94ff4f2a4ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fd2671d0634e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374002/normal_5fd1e25b41cef.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/e638c117-4e3f-46c7-8cb7-dac4c66826db/49954058262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b5b7c4-e2fa-438b-a6f1-8a65d5f09b99/basak_ophthalmology_practical.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10d742e-d495-4363-acaa-017a669f98e8/forced_perspective_photography_lesson_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/rittal_busbar_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c55766-5409-4d1c-8731-f7333148118b/66313237743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a709c8-4258-4560-ad24-a96b126f4f20/felefojuwosuwitemunivir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc5c2369-6725-4254-88d4-87e9f898491f/woberof.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/fopef.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/45783285263.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_off0000bfce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFCE 5388 bytes
SHA-256: f68288089817cdd8bb324f9d2c4cd8e2f54c3750d9628b378f3dab440a6f29b3
font_01_sfnt_off0000d24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24B 10580 bytes
SHA-256: 767abf51cf51fc0ac36efa3a5b0b1b7a8f89752ba58b4fbdf8799380df10ea44

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