Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8867f42fb3f2dc8…

MALICIOUS

PDF

78.2 KB Created: 2021-03-10 05:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef77cf2b3a7555560147f19f1689ca63 SHA-1: bb7432a48544157d09f82b9cfeb29f92bf8e3539 SHA-256: a8867f42fb3f2dc86a0177987cecac31814755b32b6a8c1d987b0868378983fb
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, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or further malware delivery. The document body, though heavily obfuscated, appears to be a lure related to a specific business, suggesting a targeted phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/wix?keyword=prairie+co+op+food+store+melville
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5fd1cde42034d.pdf
    • https://cdn-cms.f-static.net/uploads/4460461/normal_601aa5f0c710d.pdf
    • https://cdn.sqhk.co/gapalagabig/q0hdDjb/the_walking_dead_michonne_achievement_guide.pdf
    • https://cdn.sqhk.co/kekotenonaxu/ggNfVjc/minecraft_rlcraft_dragon_eye.pdf
    • https://cdn-cms.f-static.net/uploads/4454543/normal_60112a31ebcbb.pdf
    • http://lnstagramlivesupportcenter.com/noxitawokuloswqz6j.pdf
    • https://cdn.sqhk.co/dolitife/ad2iej7/4697643772.pdf
    • https://static.s123-cdn-static.com/uploads/4452395/normal_5fe1d4ab46888.pdf
    • http://golden-bridge.pro/kidde_kn-coeg-3_instructionsf7aoz.pdf
    • http://chebsvet.ru/zesejelowakulakuwuxukurr0.pdf
    • https://static.s123-cdn-static.com/uploads/4470972/normal_5fee9c5f9850d.pdf
    • https://cdn.sqhk.co/reriwoduriju/gGgejiN/gaming_wallpaper_for_walls.pdf
    • https://cdn-cms.f-static.net/uploads/4393034/normal_603ff0e484c0c.pdf
    • https://cdn-cms.f-static.net/uploads/4492892/normal_600ce2a62b9e3.pdf
    • https://cdn-cms.f-static.net/uploads/4401519/normal_6045110b584c9.pdf
    • http://grinallex.shop/how_to_do_due_diligence_on_a_company7bjbf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zurovajij/esther_ahn_kim_biography.pdf
    • https://s3.amazonaws.com/gonasidupij/clasificacion_de_empresa_segun_su_forma_juridica.pdf
    • https://s3.amazonaws.com/wefemabeni/letar.pdf
    • https://s3.amazonaws.com/ziwuvijevo/chameleon_audio_songs.pdf
    • https://s3.amazonaws.com/lijulijowivaze/gebonelikepebaxa.pdf
    • https://uploads.strikinglycdn.com/files/90711edf-2fad-4efa-8ee0-19ffe882a23d/crossbow_plans_pattern.pdf
    • https://uploads.strikinglycdn.com/files/098ca7bc-2504-4383-b30c-cbcd9e62053f/pe_design_10_free_download_with_crack.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_off0000f42e.bin
68267975e00aa52de9df93dda8b0e329550491808dce33286ee7673985446957		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF42E 5364 bytes
font_01_sfnt_off0001065b.bin
f22b87640c6c4d6f757db25e536469cca3fa3982d17861af731e60ec060df551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 10704 bytes

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