Malicious PDF — malware analysis report

Static analysis result for SHA-256 35614c4f9e9d5b6e…

MALICIOUS

PDF

46.9 KB Created: 2021-05-30 22:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 167fbaea80b7b48514703fda30819596 SHA-1: 953c1f8e815035daf364473d1fd3f428438dfb2f SHA-256: 35614c4f9e9d5b6e76fd0973bb9bd56f6df66ae92020262229eceaebbe9aba26
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as a phishing lure, likely intended to deceive users into clicking embedded links. The document body contains garbled text, suggesting it's primarily an image-based lure. The presence of numerous links pointing to compromised WordPress sites and disposable hosting, along with a specific URL containing a search term, strongly indicates a phishing campaign. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7205

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 46 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 https://nomylo.ru/uplcv?utm_term=how+to+hack+tokens+in+asphalt+8+airborne+pc
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/fnvep3m6ns3c14hnqs44nre8jm/duromerebalupewemiwa.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2c8c57eea---2390101841.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b76817a102---rapepasage.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac40086db89---79936116991.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fe5328db07c9335eacb8f12f5a9faf16/ribalewes.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc6a2bd992---70206377227.pdf
    • https://abe-rdc.com/userfiles/file/kujowapasavis.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073659ac5a54---vatapimawamapi.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/4cdd822a4f74508c7237d08386522cbf/tosavapuvedalav.pdf
    • https://nnt52.ru/userfiles/file/37617104275.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f6ed28f89---64331747975.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/0b1de282b0ef58de957208f9ba983865/6643469079.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/o1tj2fipiequcnh816t45hp3ap/44066825634.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/vi79s9pee287t94venhasgn2kf/japaromusikebezefugi.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/0bc330253b506c728e2bb9b06ed2e393/50914877603.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160774acd9365e---5767306952.pdf

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