Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a8fe96898c9bed…

MALICIOUS

PDF

52.6 KB Created: 2021-07-20 08:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d2abada4375a406f07cce6d86799b68 SHA-1: 7be800c4c5c6c79405519cca42d6a75261d49edf SHA-256: 06a8fe96898c9bed7bec5045820c8b9d600c65cc9c8b974a5429ab92610733da
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to trick users into clicking embedded links. Multiple heuristics indicate the presence of link farms pointing to compromised CMS uploads and disposable hosting, suggesting a distribution network for malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a dropper for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6927

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 52 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://taiwanglassgroup.cn/userfiles/file/gapodopuzugikeluw.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/ec131ab8af0d9d0e7589dfa7321a9766/86817222485.pdf
    • http://ranaghatpchsschool.org/userfiles/file/duwenirakedaxu.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce1751dd6b---95349804520.pdf
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/7462486659.pdf
    • https://mvpartners.be/images/uploadedimages/file/dajupegame.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080f9aaf0171---siwegamuta.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/n97amluggb25vga66chj8s010m/87356145202.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/3478d027497a37f150e47cef3f6fefdd/xovigunifakozop.pdf
    • http://drsuthichai.com/userfiles/files/40477309611.pdf
    • http://olsztyntransportmedyczny.pl/userfiles/file/50066836760.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/d78d168088b87793b078ad09276e7b83/67799557148.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/7gpnm63a091dmii8jgukrr18tv/51996488892.pdf
    • http://libron.pl/fckupload/assets/file/5831662441.pdf
    • http://vzwsportenmuziek.com/content_docs/jedulomefebexanepubajepep.pdf
    • https://bouwservicewinthagen.nl/userfiles/image/file/muvopaxawolobometatubex.pdf
    • http://baobianhkhang.com/upload/files/86443294950.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/adc0e3492301b48fbcf90c92ade8442e/70074271336.pdf
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/wirisi.pdf
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/23076662673.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=triangle+that+has+2+equal+sides

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