Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2221c4d378f83f…

MALICIOUS

PDF

82.0 KB Created: 2021-07-03 01:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a81eeed195c1daa646f2ef3b5b95db8a SHA-1: edd0fc2819f504b96fee75f69ef42d9e125e23b1 SHA-256: 9c2221c4d378f83f11afaa355f70991e1bc859c9720e96598d11ae81f707bc0f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan. The presence of a 'Clipboard command execution lure' heuristic indicates the document likely instructs the user to copy and paste commands into a shell, a common technique for executing malicious payloads. The numerous embedded URLs, many pointing to compromised WordPress installations, suggest a distribution network for delivering secondary stages or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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
  • 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://cructi.ru/uplcv?utm_term=exec+php+linux
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/5c7d80f015b6ada8711e7f1641a6cf3e/93753493457.pdf
    • http://midel.me/userfiles/file/25027777829.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/b8nd45oufs82i2q80n8gn6f3bo/toseviko.pdf
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/71596203007.pdf
    • https://dondepodemosir.com/userfiles/file/33815214101.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/333b6f4b56fcc852b57586e78e73b663/tozevowezape.pdf
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77303225327.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc26a283bee---vukibu.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16086ea8723b74---jevaxanakelug.pdf
    • http://commune-bourre.com/userfiles/file/xonijoxemuponer.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e0a2b1858---10137155969.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d039128744---tedakagulebiziluradi.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/cd885dbcf8492b3784dc21e46a088ca0/zomure.pdf
    • http://gernano.eu/gfx/userfiles/files/89773906467.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/5f228c04323e765e27102fdaccf12ad5/96305203011.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1d6782594---80863276304.pdf
    • http://architettoangeli.it/userfiles/files/jisat.pdf
    • https://cr2tek.com/userfiles/Proj_Name//files/33738429820.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/89d67deef5fd1ccca4e2a9045c9961b1/42260223201.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a30b8e264ca---pawided.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc29ebcd08---piminale.pdf
    • http://okfilm.kr/userData/board/file/womibiroxozofevefaku.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd39.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD39 16792 bytes
font_01_sfnt_off0000f54b.bin
e1ea59523e4f649ce9d1580b379475ffacb560de39cce7e55e3135f8de58b151
pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 18072 bytes
font_02_sfnt_off00012504.bin
ba3de674319af2d329b6450ed939aba768b42502b584d9be1f2a68143d521ea1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12504 10008 bytes