Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9cfd4894c0cc295…

MALICIOUS

PDF

77.8 KB Created: 2021-06-13 17:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccf5169e67d374ebbf4fc01425892a62 SHA-1: 75ff6a6f3777d22a63b69faad303ba6ef3742681 SHA-256: a9cfd4894c0cc2957a09f4baac6eea4dea2421766e95767b37d507a179fc2b6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to compromised WordPress sites and disposable hosting, likely serving as a link farm to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords suggesting a lure related to 'Justice league henti', aiming to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://laborke.ru/uplcv?utm_term=justice+league+henti
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b63aae57d---febukerogupaxovinatonito.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/fab32fe22f392153b245d08e80566a8a/lozewibog.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081d79eec49f---49242133765.pdf
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/80cc6b02aa17466198991474f9bca21e/gazumaxuwunubewedi.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/b2d2eec0fb501a864640bf3e0319a54d/dafidisadikadajuneti.pdf
    • http://itfind.ru/uploads/file/71949240550.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aabd28e1de---39659380293.pdf
    • http://phantasos.org/userfiles/file/zikigerivujugorigopitaf.pdf
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/folakominolezika.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/dae90bf54aca3c6bfe96ece7700f09be/ludixad.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607169edd7d20---76796272032.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/95ed556303da0807040d55d6a623270b/kopaza.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/d245621ee034b8088a738b4ab5e69a3d/98665018817.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942e5929224---47823009105.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8412e8c568---56586327686.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/14f0jq8kjan6dvo04tf2suir6g/51955046189.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/aoghvcr0anbj4ratqr96ce5uh1/39596108193.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f469.bin
485471c3cadab08d2d5a397f75e1d655b0568d3ab9024b09c64f61aa3be1326d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 4956 bytes
font_01_sfnt_off00010542.bin
c91f284a14487bbdbf75f151749cdf2eecfd033d7c02a9826a9c69198942287d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10542 10916 bytes

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