Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a99e02fe653b5d…

MALICIOUS

PDF

41.6 KB Created: 2021-09-23 21:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 66ee9bdbdb04c29b7c9fdfe35b1d206c SHA-1: bb9c0c2230f28b72a61df739cca435f4d004f00f SHA-256: c2a99e02fe653b5dbdca1468939c7523f179aaf6567f228129ac23a0e14dbd0c
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is structured as an image-only document with an action trigger, a common technique for phishing lures. It also features a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6964

Heuristics 7

  • 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 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.
  • 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://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/t4k1ol39824dbkmkkoia5vv3bo/72208553122.pdf In PDF document text
    • http://wwm-quanta.com/upload/files/19854848447.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/folowaxopajezevaru.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/febebanojirotajivejijupup.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b402fb5779---nikajuzotivosexa.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/29277686217.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/67708174355.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/gokazimefoweg.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/67550263367.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/12243175548.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/71260613179.pdfIn PDF document text
    • http://dkkarsin.pl/img/upload/files/88149870967.pdfIn PDF document text
    • http://ajej.pretty-match.com/upload/files/8002289956.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/bafukagigepunomigegem.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109051721085642.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/52444423711.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/limojozulisizakorode.pdfIn PDF document text
    • http://mywymc.com/userfiles/file/sunex.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia/files/nikovagonabelopuzalarovil.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/binuxenetibepa.pdfIn PDF document text
    • https://polenhosting.com/calisma2/files/uploads/13498523188.pdfIn PDF document text
    • http://freestyler.cz/img/file/98481454949.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130454c0d37b---venererimifoxej.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/17193528328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=cambiar+foto+gmail+androidPDF link annotation

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