Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fcfcf845660422b…

MALICIOUS

PDF

43.7 KB Created: 2021-09-06 15:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d44f261bce650049fbe2929cb4c12e36 SHA-1: 86f2aab211c2f01e22144c485948d0ee2dcd75ed SHA-256: 5fcfcf845660422b7aeac856aa8f34798b3a48b1b82b1bba246e558b5506e7f9
174 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV flagging it as a phishing trojan. The document is image-heavy and contains a link farm pointing to various domains, suggesting a phishing or malware distribution attempt. The presence of a click-outward action and the small file size are characteristic of a lure designed to trick users into interacting with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8862

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 43 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://vimbark.sk/editor_uploads/files/luvosipemopademom.pdf In PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35554439531.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/tojisuruxudufuwinakizu.pdfIn PDF document text
    • http://guyfamilyreunion.com/clients/41950/File/domakogeraditojik.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e602f02016---lazojotajumo.pdfIn PDF document text
    • https://honda-otolongan.com/upload/files/11989832052.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/78295069269.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2754851364---61372586950.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/57e0047e157aa9612e03f574113013f2/82606584728.pdfIn PDF document text
    • https://yz-yongzhong.com/upfiles/editor/files/33519946223.pdfIn PDF document text
    • http://brlairport.com/images/file/kugawafozubukeren.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f297bbbb10---vukaponurot.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/57281423513.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/49228877525.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9776861fe---pozosaf.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/e277d17a413e072420ebee41a8f054e3/48345930967.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/zokuvuzojukedomulipa.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/motitanewazepikejezal.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/ritebe.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/15019311309.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=short+story+comprehension+worksheets+3rd+gradePDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.