Malicious PDF — malware analysis report

Static analysis result for SHA-256 a86d7eb314b8ba1a…

MALICIOUS

PDF

63.6 KB Created: 2021-05-06 12:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77db071636c19f5f852c3f498d2ecc0e SHA-1: 405a05939317082d348bf1b90436d59a094786e6 SHA-256: a86d7eb314b8ba1aff7bd0780b27d2aa4cde8a74d453f9f5b7b1159bfbec2c9f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious content or exploit kits. The PDF's structure and link farm behavior align with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8681

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://acryl-bg.com/userfiles/file/xudijimiraxe.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad52746820---lezijudoxobewabab.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/eb074cb9eae16712cc9fe7152d06e2da/43743351938.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608447d386196---86093353094.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc4a26ac24---wivetazenovibiwa.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608661fe0e12d---19140920050.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/10e99b9fe73a8837d249dcd92db2e209/gezoxotidivenewaf.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/qir1gnhdlqd4t347pt6mjspkhd/20201774899.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/933dff681b2894332dc1f7a97baa5a8c/zomabozejugulut.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/3f58236368348a222f0b407c5c0ffb66/7041794728.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/66915428b41a8ed03f5ab8c1991bd1cf/39151054445.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/be19da7eeb6265127886130a7b943479/zeduxixujule.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082a4f772ee8---77824298592.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/f7d86713f79a0091f9191d6624dcdd45/18705988277.pdf
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/f17df5adf797538ebda9807e574e0dbe/febovuzeloranujasu.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/0f2c47484065247244e19dc82dc024c9/91904136402.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=hello+brother+song++bestwap
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddbb.bin
b2c8baa4de65f376993fd904c7ca1bcae76cb92a9aa8d13cfe3d9c4c05650116		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBB 5272 bytes

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