Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbf02c2a04d0694…

MALICIOUS

PDF

68.8 KB Created: 2021-09-10 17:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e400b4e0b8019302d859f5cdcd06b55 SHA-1: 163a15e477c7d66aea5ab133b8e8c99e124a9d1f SHA-256: 2cbf02c2a04d0694c9ae0efef1f73a14e8979651dc3ca2b495f225e723eee368
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by an ML classifier as malicious. It contains numerous embedded URLs, with heuristics indicating it functions as a link farm on disposable hosting. The primary purpose appears to be directing users to potentially malicious or phishing-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9159

Heuristics 3

  • 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://netwindowvn.com/uploads/userfiles/file/ponaz.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/582a958a88890ba505932eb8a065b62d/difewapajogawupa.pdf
    • http://poney-club-romilly-aigre28.fr/userfiles/file/samerumi.pdf
    • http://cukiernia.eu/upload/files/mozusegoxiseluniv.pdf
    • http://fecirturizm.com/resimler/files/44163237418.pdf
    • http://internet-trade.eu/UserFiles/file/nobozogovofuvosen.pdf
    • http://wsm.hk/images/files/71160424544.pdf
    • http://stylowa-pss.pl/userfiles/file/linupeginirenusagiz.pdf
    • http://tcgardening.com/userfiles/file/2021090817502173499.pdf
    • http://szyqjsj.com/UploadFile/file/20210908121542579.pdf
    • https://aildf.in/userfiles/file/mukupiduv.pdf
    • https://nikunjfoundation.org/ckfinder/userfiles/files/pelinut.pdf
    • http://peaceinsrilanka.lk/userfiles/file/90550391236.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16133adc5acd7d---degiwefimidugebojubakota.pdf
    • http://gsxr.hu/userfiles/file/vipubetazezu.pdf
    • http://dolphinkorea.com/files/files/jepilaxosakilokotev.pdf
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/70556758899.pdf
    • http://boldogelet.hu/media/52860146884.pdf
    • http://ingegnasrl.com/userfiles/files/26255768230.pdf
    • https://vienhung.com/webroot/img/files/xinoge.pdf
    • https://mrdak.cc/uploadfile/files/ribuvoduv.pdf
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/zodusefojetobulalanijan.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=warhammer+2+cheat
    • https://www.thc.gda.pl/ckfinder/userfiles/files/fapil.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea3a.bin
9331babf3780a406a1879a20198da927c07d9a05e3f25b59faa13a6daeae07c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3A 10076 bytes

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