Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce9adc757edb240…

MALICIOUS

PDF

68.9 KB Created: 2020-12-25 03:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d8a37c1c8d39c87e6b263b9c5dab3d2 SHA-1: 73a0f3ff73d192ce96f3fc95125e0691c8e7672b SHA-256: 0ce9adc757edb2402bb2c36e20eec800170aed9b78eb54a357238a993b466ee4
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, 'trafffi.ru', which is likely used to host a phishing page or a second-stage payload. The document body, though heavily obfuscated, suggests a lure related to an essay analysis, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=hamlet+soliloquy+act+1+scene+2+analysis+essay
    • https://cdn-cms.f-static.net/uploads/4388037/normal_5f9a144c491ed.pdf
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5fd2c97480eb2.pdf
    • https://cdn-cms.f-static.net/uploads/4447087/normal_5fc36c7a28dd3.pdf
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5fa987c856890.pdf
    • https://cdn-cms.f-static.net/uploads/4500440/normal_5fdc2d6650b2f.pdf
    • https://cdn.sqhk.co/marixefe/ggjOyij/30115814872.pdf
    • https://cdn-cms.f-static.net/uploads/4426941/normal_5fa76966ee083.pdf
    • https://kudomedekekoki.weebly.com/uploads/1/3/4/6/134679488/gadawejutagobet-sexukaguvabuze-tubagenob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zebarufuridorur/bartok_viola_concerto_sheet_music.pdf
    • https://s3.amazonaws.com/jusuberu/angularjs_example_application.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd9d.bin
fb279385b71ee842e84ebe04e18e0ea00ebd30a74ec1a07908fdcc4711d5e925		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9D 5220 bytes
font_01_sfnt_off0000df63.bin
46525193d01e43a10d722aa2d8d832a5e3ea24b177823cbfcb05b6794b01ca4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF63 11324 bytes

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