Malicious PDF — malware analysis report

Static analysis result for SHA-256 3150a910eb81f9be…

MALICIOUS

PDF

90.6 KB Created: 2021-06-26 02:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b78c940af8b92847710fcd86eb3e7e2 SHA-1: 089ae8d9889b87c65a2e56bb60cc95b1b6df7716 SHA-256: 3150a910eb81f9bec2bfa08f8d447e4bcfbcdd981fcfc5d2428ee6450115fc98
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, likely intended to lure users into phishing scams or malware downloads. The presence of multiple external URIs and the classification as a 'Phishing.Trojan' strongly suggest a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://oniceh.ru/uplcv?utm_term=courses+after+12th+to+get+job+in+abroad
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/5cc9414cf72f086e0819634e7e60a192/zatiz.pdf
    • http://fdscience.com/UPFILE/userfiles/files/18103462858.pdf
    • http://sb-78.ru/files/file/roleta.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/a1789439e7bfc47b05c088decfb3f4b3/60647524240.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a95cd77854---50841822492.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcafc34699---pevunabojaxa.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/2dbafe7f8940427a94e5e574ad529dd3/bufudenowam.pdf
    • https://yuss.it/file/80114758310.pdf
    • https://autotrans911.com/thread/admin/uploads/file/gomugukorarizodikijedijuw.pdf
    • http://cartonwrappingmachine.com/userfiles/file/73127649734.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/a3452c7989b788974b5ede18264fd007/55157522094.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/4455606d8c1c777383e39345016abd2b/59945800985.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/726fa7bffc68fb1e64242526136b43f9/5168810806.pdf
    • http://bomtvplus.com/data/board/file/20210609163538.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b391b3c5c---xegujilemuvu.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/e120fb672fc31216b137e3f20df5923d/29381214615.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/7ad769fa5ee3029eba1288a567aab651/57378802818.pdf
    • https://lederstuhlshop.de/ckfinder/userfiles/files/33898141166.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/975ce7c959225432a76ae4ceec4a37af/86024779143.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/2ne8jkuhbomc7vk4tfjlt17io3/77921774984.pdf
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/mibepusudatatameserule.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_off0000ffae.bin
61fd9aaa0ddd07bd99364304c4fcd74ea9bb2bdedcbffc20383a85ee02c92d69
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAE 11160 bytes
font_01_sfnt_off000119a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x119A3 16792 bytes
font_02_sfnt_off000131b5.bin
966bd603b99cb56515ac0d544138bee6c1020a19b38adae7f3d203f1e231b466
pdf-font-stream PDF embedded font (sfnt) at offset 0x131B5 16732 bytes