Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa25e73293aec90…

MALICIOUS

PDF

65.8 KB Created: 2021-01-26 04:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d82f5579642f846753f7de0875c32f06 SHA-1: ee3f3cb51f3213e16b49b3399199f2a95e2ca199 SHA-256: 5fa25e73293aec906c62f79b3e79bfb5dc748851a141cc89194d80f06b345bef
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 pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to game downloads, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://bologen.ru/123?utm_term=mighty+knight+2+hacked+unblocked+games PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448330/normal_5ffcad8349bed.pdfIn PDF document text
    • http://bupro.asia/mortal_decay_horror_gamegw4nu.pdfIn PDF document text
    • https://cdn.sqhk.co/dawajimet/mgdSMhb/tux_racer_ubuntu_install.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/dKhcRii/farowagetorusowotojeda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467910/normal_5fc7288b1ab7f.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/sumesawoxajew/facebook_app_for_android_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/34362703610.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/29771855885.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/living_electronic_music.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_off0000c42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC42B 5700 bytes
SHA-256: d54f25c0f0ab71dac427ab0329158b2f3d28a5ca532b9b3e006e53fe82927017
font_01_sfnt_off0000d784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD784 10396 bytes
SHA-256: 25e5305128efa1326204e43e611e4726c7c77a013b7f8c09e27c4dba03de8539

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