Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60465eb237cd952…

MALICIOUS

PDF

91.0 KB Created: 2021-06-30 04:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 636ce671cc3d620908bd0f5982a4b29a SHA-1: 8966eba430f007c6a85180a956d99aa749884921 SHA-256: a60465eb237cd952fb91cc5494f4cec4cf44fa9f891cfbda6dca24f616b79399
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external URIs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://crewmak.ru/uplcv?utm_term=clydesdale+horse+foal PDF link annotation
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607507186ee9a---mirunejevekuwexabaji.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/xetupebasipefebawezus.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/sbqqjb6hpl3bpqghllp3knk32h/38812573317.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/foev0vipfku2d8l2qh3jl1prg7/wilanarewodorebuwidaxuted.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a56a4e25cce---duzovukewenaxizizake.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/fe7188f316aeeb632bd585cb94239b80/kamubem.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/i4o2p8kqu0vq4k0pqpvh57u8ie/31814230548.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/86991428622.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/i3iqat7gg5vum5es3rfe63odom/15224480285.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160718f8b1f121---22970569948.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/3vhdmk40bdkfrdum868jp41com/zekikuvulosimazupirekuzup.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a09fef2bad---38371083445.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/metixalevedawobufarigaw.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/73f04f0c3c84bee0e9cd7259f1259933/80796007637.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/vfk0tgvft6ud3cn1nhelbel023/vupipe.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/wiwusinazofudasuj.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/f11fac76e3ea77b31addd672d2dc0eeb/91948898845.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/tebadi.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/bepubatibifur.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/11578778369.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/86481235004.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/tstpnt7lafr6ske6l921vaekqv/29909257870.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3dab90b50---muwesodomirinilixigos.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/deniwefejemojegal.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/jqb64jjqimldhq8bujgnkm34kq/xuxalog.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10195 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A7 17048 bytes
SHA-256: ee7344b2d84c6a1257848823de61cfbc55c7d8d381e8a675b25a520b1d2d7ce8
font_02_sfnt_off00014612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14612 10300 bytes
SHA-256: 3c1c35a077840eb49fa7ecb74b3fb89d64d7d10dfd8fbb42ea21689aa0065208