Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a579fdbc500a28b…

MALICIOUS

PDF

65.6 KB Created: 2021-06-20 06:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17fd0948119877b9e4c5a699e136195a SHA-1: 5f146c9ba7d4a34064894ee7900ef38fa8ba0fe2 SHA-256: 0a579fdbc500a28b08c64162ce196c139e7941ddd3eeca29ce6105b26acb4013
154 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF's structure and embedded links strongly suggest it is used as a lure, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8377

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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/14qiaj1gi836e9t4ik00s8nls5/sulomudam.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/6698407c7cd6bfa030bdc82e1492a703/36143412361.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/88e4c4fcca30e14514df951c1d6af2d8/19230901569.pdf
    • http://rayanchem.com/d/files/fuzutivogofidanofozupati.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/c4ae8d23ab1510220e608d3bf38d79ee/71909770619.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c9f25eae5---88595299141.pdf
    • https://zoldlepes.hu/userfiles/file/96332359285.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a78b0aaa725---gibujo.pdf
    • https://mldom.xyz/web/img/podborky/files/33277471233.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff41de28c9---33406125967.pdf
    • http://ellerbeefamilyreunion.com/clients/874543/File/niluruxefetalutevale.pdf
    • http://tpdw.pl/userfiles/file/sozemufesisubatijen.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/20a52c54a00e5d419daf5bda31073ece/18068110349.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/9c81fca0d61703f57927826d45bfe49c/85126588550.pdf
    • http://laweasy.kr/userfiles/file/mavuzewokokizisazinaxu.pdf
    • http://unseenadventure.com/userfiles/file/kaxagofoliwinunisagu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ang+pangarap+kong+holdap+torrent

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2be.bin
9cc8882f20955b3929784338d7c826db773e4b3df72be2fbb47e312e8af51a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BE 8472 bytes

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