Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9cdc8a1484fcb0c…

MALICIOUS

PDF

39.7 KB Created: 2021-07-04 06:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 6a5cd9a7e09516d6a73a2a1e6266828c SHA-1: 87eaa0dcee6361ee7d184fa378126f774db9642d SHA-256: b9cdc8a1484fcb0ca416bbce0fb4e0b61487ee1df14d8199058c819e36e129a9
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded links pointing to various compromised websites. The heuristic 'PDF_IMAGE_LURE' indicates a typical phishing shape where a screenshot hides a clickable button. The numerous embedded URLs, many hosted on compromised CMS platforms, suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8883

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
  • 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 39 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://aiswaryamatrimonials.com/fck_uploads/file/15661951292.pdf In PDF document text
    • https://dm288.rs/slicice/file/giguzipoxasexagev.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2e7448287---pemibepakik.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16232833947421.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098e0364291d---23149392151.pdfIn PDF document text
    • http://sun-eko.eu/files/file/94283280347.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be0db3b54e6---31924956898.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/5566af45e06e8b5c7f06d5021933498d/zomedijuporasepekejobozi.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7e28063c9---vizujogevajasinulopimada.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/fejapewodenikowinizutum.pdfIn PDF document text
    • http://tcihk.com/userfiles/89843146865.pdfIn PDF document text
    • https://baptistfriends.org/media/vejugobanalubujujowud.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160960dad0195c---wizisaru.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/68425424893.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/32512824542.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6a950c0b4---rerotizufig.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/27e6f8efcd24c5c3664829c3cf51721d/zafezuxigozukujas.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607091abcf00b---22418177252.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+see+pdf+file+in+iphonePDF link annotation

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