Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0f412fb717d8f6…

MALICIOUS

PDF

64.0 KB Created: 2021-09-11 19:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9eed8243c797176ab6fb31cff3327874 SHA-1: 532a3f6d5f92b561a94337605aa4b456b42fcb98 SHA-256: 0b0f412fb717d8f69eada6c2f8ddf3668e25caf3352464f419faced37408ca67
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple links pointing to compromised WordPress sites, indicating an attempt to host and distribute malicious files. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7267

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
  • 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://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/rbn61rufpi2df7u1bmqjopffs5/43646754409.pdf
    • http://acrclubinversores.com/files/galeria/files/35165934376.pdf
    • http://guanzhuli.com/userfiles/file/tujalevixobugizabiti.pdf
    • http://avandcie-automation.fr/ckfinder/userfiles/files/2732158884.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/6161151143.pdf
    • http://katour.ru/admin/ckfinder/userfiles/files/32514262662.pdf
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/wajisejiduteze.pdf
    • http://yearbookplus.com/uploads/ckfinder/files/14068705639.pdf
    • http://estatepie.com/files/userfiles/file/10119214973.pdf
    • http://koppeika.ru/userfiles/file/48256519809.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c26c8a089d---84134090827.pdf
    • https://stmarys-perthamboy.com/upload/File/mimozogilik.pdf
    • http://3dsami.org/uploadfilefiles/gopux.pdf
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/97844150317.pdf
    • http://koyomisushi.com/uploads/files/92882543655.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/hctbfcaientmj9avk8rdoj6u4q/35506435330.pdf
    • http://studiolaviano.it/userfiles/files/rujugalopuzi.pdf
    • http://dribblebar.pl/userfiles/file/depug.pdf
    • http://ssatripoli.org/userfiles/file/mosidaruxusigalibumexe.pdf
    • http://boathousebrokerage.com/userfiles/file/16360902212.pdf
    • http://4998horo.gmmwireless.com/contents/files/27290409432.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/dc2e94457fb486cf92b6e605d0d1ae03/94088924103.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=hotstar+prime+mod+apk+download

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