Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b9dc9adeca484a…

MALICIOUS

PDF

55.4 KB Created: 2021-09-22 12:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 171d94583b4aefe93baedc4840d27c08 SHA-1: 1f1ce04b669818c98a5bba7e5cec3f3556803941 SHA-256: f0b9dc9adeca484a73b8762ae1e9c68776c332c6c4ab68e230825bd998d0e6ef
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to disposable or compromised hosting, designed to trick users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8211

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://silver.jo/ckfinder/blanc/files/femibixojusuj.pdf In PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/gnkmdpfg0vfkr0mpvr4p7vp0rc/minodugedefuletunopotamal.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/79236672011.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/84241808708.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/tepolexinizobe.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/rudarisobowumef.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/67531528756.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/77141369163.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/80211891246.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/14389880279.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/61742420654.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/funuwifizalim.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/wimunefetalizalovadaba.pdfIn PDF document text
    • http://arsvet.ru/img/upload/gobevivomejavefodev.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/tchacep54gos9iulkrteo8hfu5/sodoferigadogapesirufepek.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/69666245496.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/fugefemijobukemabex.pdfPDF link annotation
    • http://arci-mp.fr/admin/File/54942224505.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/28916908123.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210914_0284E959114891C3.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/473456cad7c24c3c8b4cfec99b67aca7/xakuxenufosagivuronaf.pdfIn PDF document text
    • http://sissonne.hu/editor_up/644546508.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=temple+run+2+hack+game+downloadPDF link annotation

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