Malicious PDF — malware analysis report

Static analysis result for SHA-256 10bc0c0ed7d430ca…

MALICIOUS

PDF

73.5 KB Created: 2021-02-19 08:05:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 413be38bd7b01327bef6805ed8d2b1fa SHA-1: 5fb9c8fb06eb6bf0553fb0b105181a2498d62147 SHA-256: 10bc0c0ed7d430ca5099fddb4adddfe2030802fd0890e06478320f0aad069ddb
96 Risk Score

Malware Insights

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

The file is a PDF containing multiple embedded URLs, one of which is `https://bologen.ru/wix?keyword=nevermore+rwby+song`. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=nevermore+rwby+song
    • https://cdn.sqhk.co/jovowosifo/gia2AVR/zasekalezise.pdf
    • https://cdn.sqhk.co/fatidizeru/ijyjcQo/erica_app_ps4_ios.pdf
    • https://static.s123-cdn-static.com/uploads/4500665/normal_5ff318d23ecf0.pdf
    • https://static.s123-cdn-static.com/uploads/4389376/normal_5ffbe010dde56.pdf
    • https://cdn-cms.f-static.net/uploads/4373778/normal_60212872c36cd.pdf
    • https://cdn-cms.f-static.net/uploads/4422367/normal_5fda07d30505e.pdf
    • https://static.s123-cdn-static.com/uploads/4367302/normal_5fe24369dcde8.pdf
    • https://cdn-cms.f-static.net/uploads/4369915/normal_601dbdba1c2c2.pdf
    • https://cdn.sqhk.co/fuludasowipu/ujaxVmo/kapetaguzaz.pdf
    • https://cdn.sqhk.co/vakanaju/2ggjdgh/vesoja.pdf
    • https://static.s123-cdn-static.com/uploads/4496853/normal_5feb96ae66120.pdf
    • https://cdn.sqhk.co/koxajavu/jTzPQhi/top_tier_heroes_in_hero_wars.pdf
    • https://cdn-cms.f-static.net/uploads/4412584/normal_6023c945a44b0.pdf
    • https://cdn-cms.f-static.net/uploads/4414869/normal_600ff23a55396.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mogedozara/comcast_report_outage_phone_number.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0fc.bin
f75e275cad8e015bb1325345f6db04daf121baa2df1a8de8ca3bba8f2dfdad64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FC 5376 bytes
font_01_sfnt_off0000e3a7.bin
3a2862280af970db96e3f1ffa8881862c72e5f436591afe09da5f967abf73a77		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A7 5128 bytes
font_02_sfnt_off0000f526.bin
242812f61348e07ae8b382a6ef947b5fec5d39097896ce6c4a48323207c956e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF526 10548 bytes

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