Malicious PDF — malware analysis report

Static analysis result for SHA-256 942fc2a2fcde3883…

MALICIOUS

PDF

70.6 KB Created: 2021-10-05 05:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4f06cfd99b8abd0568fe8f81d315ebd0 SHA-1: 4a32bb33072ea9fc72950ecdcaa6a3d63179de89 SHA-256: 942fc2a2fcde38831be98307bc4b3bfe46a06e96992f7a0c7f78ca936b426541
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm used for phishing or malware distribution. ClamAV detection and ML classification confirm its malicious nature. The presence of external URIs and embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6613

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://coretry.ru/uplcv?utm_term=steroid+tablets+meaning PDF link annotation
    • http://antwerp-reefer-tournament.be/argt/files/51358757271.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/af99f8edf456211f240993fc591e4aa2/puzim.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e678e6f08---dezefetadagigawuri.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/68766088189.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/sagoniwameno.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/mirilo.pdfIn PDF document text
    • http://nanopena.cz/upload/file/84081561439.pdfIn PDF document text
    • http://dogable.de/userfiles/file/46656885187.pdfIn PDF document text
    • http://kotolantopeni.cz/file/kanijuroki.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/tikuleme.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/jefoxit.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/vorade.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/dikaxiresabozifipudivogat.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/3046422872.pdfIn PDF document text
    • http://decaiyun.com/upload/file/2109132004481829626xnbwgj84398.pdfIn PDF document text
    • https://nikunjfoundation.org/ckfinder/userfiles/files/19850681002.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/36493308594.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/81465573834.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/74628678566.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/14635673265.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/kenidijuvuginedurufabi.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/denuwuposoridalop.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021104_21530_447.pdfIn PDF document text
    • https://kaptenhoki.info/contents/files/32811507039.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A5 10808 bytes
SHA-256: 828aeeaa63792b4f0b10a648f3d6066c7898db2f890cefd2d6bd9ff47b23b950

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