Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef6f7515cd7f197…

MALICIOUS

PDF

70.0 KB Created: 2020-11-24 20:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ea14f5a55b7e8037c48efa774d11c632 SHA-1: 773a01b9bf86e05774158d57e8b4602078b342bb SHA-256: 8ef6f7515cd7f19781322b88ad952e2a3f31e7665ee67bf050435441dcfaad3d
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. The document body, though heavily obfuscated, suggests a legal context, likely to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=sample+objection+to+subpoena+duces+tecum+california PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406481/normal_5f971be63e2f2.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/leguvefu/analyzing_sentences.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/38871631670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e32592f5-7c39-4c5e-bb39-671b4a3a81e4/17328477080.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/display_system_and_anthropometric_data.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/18238827983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/930e4243-8547-4864-8b0d-03780958de3d/bujok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43481ac0-5085-4e6f-956b-88427ae790f5/11181146127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a0b8aa-c0ae-41ca-a5a8-4a15e83cd545/dream_works_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/201fd6a7-bf87-44a7-a003-28cb2d435f9a/club_penguin_mission_8_puffle.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_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 5620 bytes
SHA-256: f4ec3eefe25a53b5adee23ac45094499665adeadcba2effb08e57c01f246f8e0
font_01_sfnt_off0000e8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FD 9940 bytes
SHA-256: b29422d2f772abf6dc3c8179044e8827788e1ba6828c213abe7e0e578309bb9d

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