Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a03d01fc5e04082…

MALICIOUS

PDF

84.3 KB Created: 2021-06-30 23:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c3c61e5830a67c4357abb1304e17a7d SHA-1: 92538f3cf6832310ba08d3746d2c97cf041e0c86 SHA-256: 2a03d01fc5e0408295fc7b87430a2ad24bdcbbf63e16e83bf92ddee541e17bc3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a link farm used for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/3a8dc5b9bb45fb66f97fd2b64f953bcb/16056472765.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797e1bdaf1d---12234365472.pdf
    • https://glbtrader.com/userfiles/file/kenew.pdf
    • http://www.look4job.gr/images/_user_na/file/pujit.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c37f65272---losulejemedagud.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a46612d08d9---40173272945.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079fe0474698---79551972366.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/94b418a403988c6456ecec2bb6cdc909/sinekovegobirola.pdf
    • http://sea-cruise.ru/ckfinder/userfiles/files/60087733354.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/228de6e4e52e7d05fc797b41a4591673/nenejixebomiwebususap.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160825510426fb---dezipov.pdf
    • http://studiodrago.eu/userfiles/files/78101971328.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/27e4722deb3db1b71019a127e7c319c8/femukinoge.pdf
    • http://dinskayarealty.ru/media/file/sefujimov.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/6772203a017e644c00020f9bae3de288/fazotonavovakemik.pdf
    • http://bagiez.com/userfiles/file/74943075908.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/837fdfa6f80b57204f25abf9436fb375/xegelavujetopubosalubeja.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/af6a4e7aaeb4b8db3d3d15ebdde01731/84827477446.pdf
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/xejofa.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/5dc6fcfee052293ea64d4480aa7a2474/53512662900.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4ecaa7775---tejawesab.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/59a2683e04aac211291f37d2b34d2a99/93824624328.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/a9a984c770fcbd838195d4acabcf77fe/14010020752.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=past+perfect+future+continuous+tense
    • 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_off0000e792.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE792 16792 bytes
font_01_sfnt_off0000ffa4.bin
f7936157f7bbd6a125622535b63fd0b10c42a889546f34cec3549e4b6e855360		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA4 17112 bytes
font_02_sfnt_off00012bff.bin
441e8272cf416bce06e681abf9feb3fb4cb0b1088684c5b4df7829849f6f5c0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFF 10528 bytes

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