Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a454c6f7d42a6de…

MALICIOUS

PDF

41.1 KB Created: 2021-09-17 17:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 47d20d4e231c19cbb86fb6633585a32d SHA-1: ca828ca4b337aad4efc8df47548a0ca831c18a3e SHA-256: 1a454c6f7d42a6de148efa272eb8d47999a2a78930c14a118b7a49e30f73d515
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to hide a clickable link. Multiple heuristics indicate it functions as a link farm, pointing to various domains, some of which are hosted on compromised CMS platforms. The ClamAV detection and ML classifier further support its malicious classification, likely serving as a vehicle for delivering malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7526

Heuristics 6

  • 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 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://vo23.ru/upload/file/zatulasedimirujob.pdf In PDF document text
    • http://aligokdemir.com/resimler/files/widit.pdfIn PDF document text
    • https://birotex.rs/images/files/43818688135.pdfIn PDF document text
    • https://qnzar.com/files/junizesedazotipapubid.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/21389581730.pdfIn PDF document text
    • http://popmetre.com/news/files/26372558686.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1653195cf---lapaz.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/bewuka.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/desijijiwikib.pdfIn PDF document text
    • https://insinkerator.us/images/uploaded/file/19624695683.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/31696540492.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f6d0e71abe05a4f68bc905101ddb2514/67696484136.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/lofekexezinaduguxexew.pdfIn PDF document text
    • http://cbafjvn.com/uploads/userfiles/file/51373541285.pdfIn PDF document text
    • http://reichspfarrer.sk/file/javegib.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/4d980bcd72a9f5397e6b7401368376e9/siwavevuj.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/161442ff292545---67778711705.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614309f34a8e5---pafafukozuwedujepene.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34987584666.pdfIn PDF document text
    • http://islenapuntos.com/campannas/file/nupukebepedanazasowexe.pdfIn PDF document text
    • http://dobermanncz.eu/files/wixojev.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/wogosaxene.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/badutufedop.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/95127462283.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=mortal+kombat+kano+moviePDF link annotation

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