Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f38d31d39efe39c…

MALICIOUS

PDF

100.6 KB Created: 2021-02-09 23:33:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed122dd930d13fa8e9b396073ea6e7b2 SHA-1: 8dac6d35cbe51d11dbdff149261ba2c993b0d46c SHA-256: 2f38d31d39efe39cfb8c1e41bad284203cf3eb99999b3d005fdb6cca52df98d0
124 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URIs and the overall structure suggest it's designed to redirect users to potentially malicious sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7290

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/aws?utm_term=cps+online+report+texas
    • http://lafovug.iblogger.org/carrier_air_conditioning_instructions_manual.pdf
    • http://deutschebank-meine.com/73266272560qkjn9.pdf
    • https://cdn-cms.f-static.net/uploads/4451736/normal_5fe9fd350ecef.pdf
    • https://cdn.sqhk.co/zujumatatub/fVgjjRZ/can_hitting_your_cervix_cause_bleeding.pdf
    • https://rixafewokeget.weebly.com/uploads/1/3/0/7/130739987/6266655.pdf
    • https://static.s123-cdn-static.com/uploads/4493916/normal_5fc6b56317f1d.pdf
    • http://iceteas.space/gotikatifiseob29b.pdf
    • http://wavasesinile.22web.org/risafewaxomovuzexusuwabu.pdf
    • https://cdn.sqhk.co/vatepasoxi/aPsPGgd/24594348836.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lutaretubonen.rf.gd/best_android_rpg_games.pdf
    • http://mivevusewez.epizy.com/62517567583.pdf
    • http://vagilamiporaw.epizy.com/ramasoki.pdf
    • http://rokodejufoda.rf.gd/65503680038.pdf
    • http://worined.epizy.com/aranjuez_music_sheet.pdf
    • http://likasiz.epizy.com/blood_type_diet_free.pdf
    • http://kuparego.rf.gd/tigid.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000151ac.bin
2028d21669380b6431bb0fa1dc54acf90cfe692db67ebdfdecbdd6045b6b294d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151AC 4692 bytes
font_01_sfnt_off000161a4.bin
f9d2cff5d68b068fa7226649302aaebfd127ccf30bdf25768ad266ab1504dbc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x161A4 11496 bytes
font_02_sfnt_off000188ae.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x188AE 4324 bytes

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