Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12600ad083cd18e…

MALICIOUS

PDF

62.5 KB Created: 2021-09-01 20:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6f654061bc514ea5f8d52fd0d9c86b82 SHA-1: 5f578856d9b80748dfc4ee29a9d7ecb01452894f SHA-256: c12600ad083cd18e87b7158546477a5e1f7d42d56150d69246c8bb91ef4b3f54
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit user interaction via malicious links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9075

Heuristics 5

  • 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.
  • 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://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608080cea5fae---garan.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70ee623cd4---90072652399.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/b4e85424bd9e796970038b209e8e7a6c/tepalujozupasigozanebavuv.pdfIn PDF document text
    • http://cukrarnakolbaba.eu/obrazky/files/72816037413.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/423500c8e4361d9eb375deb9b5b4f62a/pumolexupalozolovomasan.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/vokedepomed.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/zizulopamiluv.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/74jvvsutl2tsaipl0b6e7vg13e/85689094436.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/d3rufji69au9hu6pdc8fmf3auf/5032944829.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ba483fbc2---darunixumab.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/41469870989.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/29670669912.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/c7hph6gi5dftoov78cu34cc5h5/katakatej.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16099b01a06047---80344344406.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/25399606687.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/69106151680.pdfIn PDF document text
    • https://shinko-tw.com/UserFiles/file/wopibusipu.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/bf3172b4438edad0d6cf7914395b49d4/temib.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/benonefokixaxososeji.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081046faccb8---kunubusozexisedozup.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/jenowen.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/73783449227.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/85327647065.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=questions+about+the+hunger+gamesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC162 15648 bytes
SHA-256: 393d03b114380c26d6de23655c23cc49a606682ace0a3568c24ff67a9370e4c9

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