Malicious PDF — malware analysis report

Static analysis result for SHA-256 4657d4fdf9701eb4…

MALICIOUS

PDF

72.7 KB Created: 2021-03-23 01:35:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4160484a70bf9cebfe2e1d59ac746f7 SHA-1: 317399da3954a25c25574223e9a754a2c1e6768c SHA-256: 4657d4fdf9701eb42271146ffc6395e50b3af77bd329942f988ded8657302595
94 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jumiwimov.ru', which is likely used to host a phishing page or download a secondary payload. The document body, though heavily obfuscated, contains strings related to 'wkhtmltopdf' and a movie director, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9546

Heuristics 3

  • 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
  • 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://jumiwimov.ru/strik?utm_term=tree+of+life+movie+director
    • https://static.s123-cdn-static.com/uploads/4386842/normal_5fe3dee38a4f3.pdf
    • https://cdn.sqhk.co/fosojatesog/jXOSYjc/40923473683.pdf
    • https://cdn.sqhk.co/reriwoduriju/id2iEii/90341328629.pdf
    • http://damvglaz2.xyz/elena_and_damon_sleep_together_episodes2m5t.pdf
    • https://cdn-cms.f-static.net/uploads/4488141/normal_602e369055a09.pdf
    • https://cdn-cms.f-static.net/uploads/4408355/normal_603c3e59c9c0f.pdf
    • https://cdn.sqhk.co/dewufidabo/njjygzi/31713928010.pdf
    • https://cdn-cms.f-static.net/uploads/4373509/normal_602c396b29789.pdf
    • https://static.s123-cdn-static.com/uploads/4366351/normal_5fdce2a7d861f.pdf
    • https://cdn.sqhk.co/kamepixuxuk/eEibiYk/34658877701.pdf
    • https://cdn-cms.f-static.net/uploads/4371543/normal_60418f4637bf4.pdf
    • https://static.s123-cdn-static.com/uploads/4466154/normal_5fd0734dd24cf.pdf
    • http://vedice.ru/computational_fluid_dynamics_nptelukf5j.pdf
    • https://cdn-cms.f-static.net/uploads/4457014/normal_60511febedcd2.pdf
    • https://cdn.sqhk.co/tinupolureg/thagihe/cat_has_runny_poop_all_the_time.pdf
    • http://itanah.space/iphone_stickers_for_androidkrkpt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vixuwogetiv/email_signature_outlook_app_android.pdf
    • https://s3.amazonaws.com/gowupuzokowuxes/68164922087.pdf
    • https://uploads.strikinglycdn.com/files/5c4d2a7c-bd18-4295-b9ec-9fd361f4d840/pebutared.pdf
    • https://uploads.strikinglycdn.com/files/f538e7cd-3794-457a-ab0a-0f0d4fa76d5b/buredatat.pdf
    • https://uploads.strikinglycdn.com/files/dbb9ac6a-5462-4df5-96bf-f7231f31a156/2837831848.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102ef.bin
8dc734a5a5f464d04530b23da2c0cf11ed261371b2f8e40ce3956a37c08c68fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102EF 4788 bytes

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