Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0f2f2771a4cf43…

MALICIOUS

PDF

70.3 KB Created: 2021-01-09 20:29:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f76d5b89c63db9994776fb3debed444 SHA-1: 8c745f2f8c96de4893e1957beea3de6addb27e9f SHA-256: 8a0f2f2771a4cf43849d84be63a1fd0bc8e1fd375b71c800ea05af67beaaef2c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafftec.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to dreams or games, 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://trafftec.ru/123?utm_term=el+libro+de+los+sue%25C3%25B1os+tombola
    • https://site-1168414.mozfiles.com/files/1168414/manafix.pdf
    • https://cdn.sqhk.co/refowofiros/dEibUgf/bike_rider_3d_game_download.pdf
    • https://cdn.sqhk.co/xejudawadoni/zQhahiF/monster_defence_king_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4459792/normal_5fbede215235d.pdf
    • https://cdn.sqhk.co/bowewulaxam/hghxhbi/78817609819.pdf
    • https://cdn-cms.f-static.net/uploads/4452374/normal_5fbe01cfbab22.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dugibabafod/venogazuwofabemisosod.pdf
    • https://s3.amazonaws.com/nazekisigiduz/xojemozamuguxedelav.pdf
    • https://s3.amazonaws.com/nijosinizo/flawless_real_talk_age.pdf
    • https://s3.amazonaws.com/xufoxorog/materials_research_bulletin_template.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_off0000d278.bin
4cf29f50678778446ac8bfd4860ad6c5e5d15f9216d2939259e52f5d4f3a82d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD278 5280 bytes
font_01_sfnt_off0000e403.bin
966148081f1bcec00ffa7a2ced2144ff6a4162bead4627b9041b093af36319e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE403 12560 bytes

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