Malicious PDF — malware analysis report

Static analysis result for SHA-256 9908fc4d73718258…

MALICIOUS

PDF

89.8 KB Created: 2021-06-30 03:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3c978f1988a61f793f9891929a30d15 SHA-1: d0a09adbc9119c1b8fb73cc4fc25a57e132887e3 SHA-256: 9908fc4d73718258ef9f87dff259423406e570cc202a01b2bb949b180b78ad95
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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
  • 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://huntic.ru/uplcv?utm_term=artist+of+the+year
    • https://5uempat.com/contents//files/46035469733.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/4cce1c024306ff12dc5e683c12b65085/87448079992.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/23853325279.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/07e02e30ebab6c91ce5e3836deab0e7d/womewuzakunorobu.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/0s5tnu636b70jpnsepjl56vq00/negugadu.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089ef275e774---1298720872.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1c303c552---jefuwazugugusuxe.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/nfbnanbvko7ruk2lbli8pqnl27/67712736087.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4ea3edc07---vosugiruziretabulegad.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/063e06dbfccabef7109e3daadd69b259/kupalizasufutekenadox.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/23oihaf2bjq6ef6f3r37j4jkj1/52331423024.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/e4e765a58ad0120f6d21f9c1d23adb62/68528072018.pdf
    • https://jaiminsales.com/ckfinder/userfiles/files/mipozusizigewejifulewoli.pdf
    • https://digireg.dk/upload/55883839387.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607725c825942---kevaruwonekumi.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/pr8ndson6tt9vpmueifiej23j1/fitisavodexum.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/0458f620f1480b3aa56fc23260d049ff/foremuvawumema.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfce74f924---92839345965.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/e9428f50975d4125509054293a445cb1/43728748238.pdf
    • https://audreyheselmans.com/_files/file/73975159008.pdf
    • https://roweryelectra.eu/app/webroot/uploads/file/16200162618009.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f02236c35---pesakoponijibebibupomil.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/087bbfc2fa64ec91e93d49554d537954/tukalurizereb.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/415a3468fe5718c28b915a4aa06dfc93/90839923683.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/19405b9b32077d7ff8a2227b1e4b3fc0/17077445742.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_off0000ff47.bin
771541c3414f98ba05cc351e2557a8df651d8e8d794d805ee577f641125277f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF47 16664 bytes
font_01_sfnt_off00012abd.bin
2a1a5cccf922b2aa172ad619c533545c1a61b1ece55c871f44e8793deabd8cd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABD 10256 bytes
font_02_sfnt_off00014203.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14203 16792 bytes