Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa9bc8dfa73ab46…

MALICIOUS

PDF

81.4 KB Created: 2021-05-21 15:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a40762da172fe9bdf9e509e4ae93a652 SHA-1: 35f25210d3d29b33879978c6d6467f061f391afc SHA-256: dfa9bc8dfa73ab46ab3840bddf765747202edf68909ac3c41da59de0b7882933
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing. The primary URL, https://jumiwimov.ru/strik, is likely a landing page for malicious content or further phishing attempts. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9518

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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=tableau+tutorial+point+pdf+free+download
    • https://static.s123-cdn-static.com/uploads/4372074/normal_5fde7354312b8.pdf
    • https://static.s123-cdn-static.com/uploads/4489042/normal_5ff1acca1e149.pdf
    • https://kokezixunilo.weebly.com/uploads/1/3/4/0/134096179/796c56f146dd.pdf
    • https://dotofinadi.weebly.com/uploads/1/3/0/7/130740455/mirulu-nopagobemafum-vinenunoraw.pdf
    • https://static.s123-cdn-static.com/uploads/4417024/normal_5ff145a2caa46.pdf
    • https://static.s123-cdn-static.com/uploads/4377114/normal_60031705c7105.pdf
    • https://cdn-cms.f-static.net/uploads/4467955/normal_605b90f9dd2db.pdf
    • https://cdn-cms.f-static.net/uploads/4378843/normal_6039a6b841145.pdf
    • https://cdn-cms.f-static.net/uploads/4490128/normal_5fe913514deb4.pdf
    • https://cdn-cms.f-static.net/uploads/4370263/normal_60362a6f6b731.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fomudebipefasu/ausentismo_laboral.pdf
    • https://s3.amazonaws.com/pexodugosa/who_dies_in_yttd.pdf
    • https://s3.amazonaws.com/timeziso/urdu_videos_songs_free.pdf
    • https://s3.amazonaws.com/zaxefemebidaz/davesiduzeje.pdf
    • https://s3.amazonaws.com/fovezewi/47541720377.pdf
    • https://s3.amazonaws.com/musoxifuvitalo/48633175928.pdf
    • https://s3.amazonaws.com/remuv/phet_molecular_shapes_vsepr_answer_key.pdf
    • https://s3.amazonaws.com/befarekogol/legend_book_by_marie_lu_movie.pdf
    • https://s3.amazonaws.com/vosimalume/zokenijut.pdf
    • https://s3.amazonaws.com/dujepav/illustrator_templates_for_infographics.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001185e.bin
ea4a93dd6a07cd85d6d553963c9ecab9c10747a7220bba5719a603c80d0b38d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1185E 5040 bytes

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