Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d95cb9604aeb9b…

MALICIOUS

PDF

48.0 KB Created: 2021-09-27 04:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f87c5c5ee3b3be9139d65ce7a8c3567b SHA-1: 0e3b121da7d3743339413c0e64065f56d0e9e80f SHA-256: d8d95cb9604aeb9b3ac3e90253464f35f074ff7eeecf2e98e95ddb4dc94bb3fd
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It is an image-only document with a small file size, designed to trick users into clicking embedded links. The numerous extracted URLs, many pointing to PDF files on various domains, suggest a link farm used for distributing malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6578

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 47 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://olterus.org/contents/files/47862771482.pdf
    • http://freestyler.cz/img/file/buleferulalekewama.pdf
    • http://htwy.com/upload/file/26260872014.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/9749686e9347d77aa8474cf1827a918a/xakewudajagefe.pdf
    • http://imosa.asia/uploads/files/202109120713246941.pdf
    • https://yunglin.com/uploadpic/files/47425029070.pdf
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/xavokelu.pdf
    • http://vakaruinzinerija.lt/userfiles/file/62032217514.pdf
    • https://institut-arabe.org/ckfinder/userfiles/files/37947924953.pdf
    • https://ksi-system.pl/editorfiles/file/52554946146.pdf
    • https://aldaserwis.pl/ckfinder/userfiles/files/45738990182.pdf
    • http://mrhobbscoffee.com/images/uploads/file/93509159607.pdf
    • http://baltyk.recykling-rejs.pl/imgturysta/files/98277034644.pdf
    • http://studioambienteterritorio.it/userfiles/files/51976040159.pdf
    • http://www.kotolantopeni.cz/files/30024796977.pdf
    • http://dienmaythanglong.org/uploads/files/56660215021.pdf
    • http://buyyoutubelikes.com/ci/userfiles/files/34291869947.pdf
    • http://jarosi.hu/files/file/26045446798.pdf
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/tofuneledoputovo.pdf
    • https://sankaibearing.com/userfiles/files/jesulurokabiw.pdf
    • http://kamakuralosgatos.com/uploads/files/togimelazixuvosoduvijuwem.pdf
    • http://dyglas.com/userData/board/file/92346250571.pdf
    • http://cwesp.biz/upload/file/lepufewebebi.pdf
    • https://verredistri.fr/xmedia/file/vuwuwetedirulugu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+get+free+vbox+on+switch

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