Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b66d38a1672061…

MALICIOUS

PDF

41.7 KB Created: 2021-09-22 10:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7f7ab5b37458b4c6616e7cb1b7bd6348 SHA-1: 3100a888512458675d29a588b5a0f81ad3177b5e SHA-256: 08b66d38a16720613d77392d60906b5b24b8f84886523bf7d485b81f49da3509
182 Risk Score

Malware Insights

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

This PDF sample exhibits multiple indicators of malicious intent, including embedded JavaScript and a high density of external links pointing to various domains, some of which appear to be compromised CMS uploads. The heuristic 'PDF_IMAGE_LURE' suggests the document is designed as a screenshot to trick users into clicking, likely to initiate a download or redirect to a phishing site. The presence of embedded JavaScript, combined with the link farm, indicates an attempt to exploit vulnerabilities or deliver a second-stage payload.

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 https://inwebjor.ru/uplcv?utm_term=ms+office+cracked+version PDF link annotation
    • http://essiac.cz/UserFiles/file/dusagiridinox.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/bf57b9876dc5c903049912d86af206ad/70304368576.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/91580499178.pdfIn PDF document text
    • https://immobiliareincentro.it/allegati/file/52535685634.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/3254899647.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/winiworoweb.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/58962871355.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/vebumiw.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/35533783565.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/34224727339.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1f7e463fe---todurelevev.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/zixejimetapujolaxejox.pdfIn PDF document text
    • https://florissantdesign.nl/docs/Image/file/gafazitajokoja.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/forojixesewazuxara.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/2bc7c47b84134588444f1f8ffea39963/boxagenifesatujevoxibo.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/saregevidosanadolex.pdfIn PDF document text
    • http://trevorhannant.com/77929906071.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1631589374.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/jejowukewenajaledixubib.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f087cc0a46---78680067380.pdfIn PDF document text
    • http://merwepizza.com/upload/file/30366618210.pdfIn PDF document text
    • http://fabriquetextil.com/js/new/fckeditor/userfiles/file/37887974669.pdfIn PDF document text
    • https://businesslife.com/content/files/30363480844.pdfIn PDF document text

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