Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2057ed62e670eec…

MALICIOUS

PDF

41.8 KB Created: 2021-09-18 10:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 821e1b4bac44dbb45120e0aecab9f071 SHA-1: a485ba2f1108ab06942dbb6c273954f2d7495a4d SHA-256: a2057ed62e670eecf77597040953573aebcc9050301c576bc98c2bfd49dd2d64
182 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document's structure, with minimal text and a clickable action, strongly indicates a phishing attempt designed to trick users into clicking a link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7020

Heuristics 7

  • 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.
  • 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 http://artstudiodesign.it/userfiles/files/61012691162.pdf In PDF document text
    • http://garderoba.sk/images/_file/kovapaleg.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/pilaven.pdfIn PDF document text
    • https://kolkataangikar.org/ckfinder/userfiles/files/jizanuvogojunatagukipudo.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/9f2fc6116f03df0cc4a304991f725495/vosapo.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/vg3t9mc2hsmqlofogmpr2v45ol/48743996908.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/1292937693.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/fidixakagavoz.pdfIn PDF document text
    • http://myphamasia.net/upload/files/ripoxoxu.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372381cf41d---34877960282.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/19686237426.pdfIn PDF document text
    • https://laps.pl/userfiles/file/37969172980.pdfIn PDF document text
    • http://yuhao-tech.com/userfiles/file/nigake.pdfIn PDF document text
    • http://szhlfz.net/upload/wufilipizodeperalevipiv.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/gatabuf.pdfIn PDF document text
    • http://timocomputer.cz/files/file/nuwanulepanadul.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/lafumajifoluxuwufexas.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/wasujejurofezugutefaka.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/15521490230.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb9bc1fffb---vikokemopokovo.pdfIn PDF document text
    • http://limoride.net/gallery/file/68702964870.pdfIn PDF document text
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/tovumakodemoj.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/85694613070.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=flushed+away+free+onlinePDF link annotation

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