Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f03df8699f258c8…

MALICIOUS

PDF

45.7 KB Created: 2021-09-05 09:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0df26a412c44d25b95ed761fad142dab SHA-1: 0967341cfc20a0628b88f1532fbe0c754013b26c SHA-256: 4f03df8699f258c899cb508d9cdec141901c55bf4a63e7fc48e4bd49395f4de0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also features a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a phishing lure or a downloader for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5966

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/dd0a219f0a8a678828bf2ec5f9633f75/poluvolozikasuropur.pdf In PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/jerugogat.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4c54580eb---84517887593.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/89704070554.pdfIn PDF document text
    • http://zcapitalcrm.com/app/webroot/uploads/files/18245402192.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/1c897feeafe22b568bbe925459520b98/44701444879.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/gesubeselibiw.pdfIn PDF document text
    • http://teifsepahan.com/files/file/tagigizekumewuz.pdfIn PDF document text
    • http://myucpb.net/userfiles/file/teziwubujevufiwabuzufopo.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/43152546173.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/75666091408.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/mstplq4l32db68r7cr2gpnjgc2/38893991285.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/182fcc16c5999b0ae9e402b337e250f0/vanatixurotinu.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/25lhaasj1fl5jds9na988842gl/53383442659.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/xokivelinusujo.pdfIn PDF document text
    • http://meta-min.com/files/19042173503.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/kugameguzadibimirefabi.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wasaderew.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/wiwegutevasupunoriminox.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa536cacf21---zasikudogoluzawix.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/35627600293.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd48036616c---pisewijoron.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/mobizifen.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/vidovutebesope.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/k33ksqdum3317m0anvgtac92q6/15851340565.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/30237048747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=information+technology+systems+installation+methods+manual+%28itsimm%29PDF link annotation

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