Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7643532853f93f8…

MALICIOUS

PDF

47.7 KB Created: 2021-10-16 09:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bfb125ef3dcf6e835aed142347c21c33 SHA-1: d80613e0e2370be59046facfafa531870d41044b SHA-256: f7643532853f93f81a695ab4469b3d68de05691b3446d1e5b5d05e82ccf357b8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a non-clustered link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7471

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://catamma.ru/uplcv?utm_term=paying+lump+sum+off+mortgage PDF link annotation
    • http://neoneofitou.com/ckfinder/userfiles/files/xujanem.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/tuputodomalejugoduvu.pdfIn PDF document text
    • http://adatarimhayvancilik.com/Images/Media/files/9502257899.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155df2d6aabb---34617685080.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/72155487361.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1633002296.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/vepovojapuzuvojepafufi.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/68765138718.pdfIn PDF document text
    • https://costarica4d.com/contents/files/rezujovizotudej.pdfIn PDF document text
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/38968709148.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/48462880465.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210903140101_1850974164.pdfIn PDF document text
    • http://cocoal.com/uploads/file/6962557263.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/jazunerowabomiraganupimes.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/kupodesokurojiv.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/51143151597.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/laligagusibexoloxapujipa.pdfIn PDF document text
    • http://praguetransfer.com/files/file/78295183180.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/69008852340.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/70553393395.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/xagifoxopime.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/liludibudomujibuvo.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161462f039a622---dukojaro.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents/files/14332776721.pdfIn PDF document text
    • https://tahsindincer.com/upload/ckfinder/files/78784170679.pdfIn PDF document text