Malicious PDF — malware analysis report

Static analysis result for SHA-256 d184eabdce64b138…

MALICIOUS

PDF

86.4 KB Created: 2021-07-03 07:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 537ec840bf4dbf7558882449373af2e1 SHA-1: c12f2e0fa326d801f21cc3d18efbaad4de539acd SHA-256: d184eabdce64b138ef1934d27b85edfe7ff2d4cebf4fa1803c2e405ba4eabdb6
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, including compromised CMS uploads and disposable hosting, which is a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://zold-kommando.hu/files/96404596982.pdf
    • http://sochistandart.com/ckfinder/userfiles/files/35990468278.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/18269d93df5ede2ebfaf85779dcef6a5/9358522458.pdf
    • https://tedvandergulik.nl/userimages/file/mebudopikosekizaga.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/18d6579694027385bba425d8ce360701/20319671128.pdf
    • https://tipresentoio.it/images/file/kavigeketuxivujovavakevid.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af9589af4f8---43022631753.pdf
    • https://binarbaidfabrication.com/public_html/userfiles/file/53369892327.pdf
    • https://aawyx.com/sites/default/imageuser/file/wonirono.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/m5rmo6elnc3q7763nf536kr2mj/wanejezumunagexonoboxeb.pdf
    • http://www.thaiboat.net/image/upload/File/leribi.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/0ea36c928fdffb7e523987a1482dc1f3/tijoxix.pdf
    • http://md-servicios.com/userfiles/file/66408983513.pdf
    • http://ed-web.cz/userfilesfile/27552009520.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/24193131a458dd67fb0a0b4c24a1b03d/vezimilutew.pdf
    • https://partner-support.net/user_data/userfiles/files/xexulizowonurepiwi.pdf
    • https://tavio.ru/files/file/kigor.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/bc2bf5b51af9fd588f3de9399cafe622/73934179838.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/33c5721366c746a05e1105125272c895/dolokigexedilota.pdf
    • http://xn--dlek-5qa.com/admin/UserFiles/file/4364500164.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/4dc56266afd576ad0c4ad4a2c0d11c11/pilizokib.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=direction+not+available+iphone+map
    • 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_off0000edab.bin
bfb35d3337d1297054b714e2cd0e365a2360ba2f038e544f309dbf26a9864dc8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 17828 bytes
font_01_sfnt_off00011c92.bin
ab4cb36a8b1d987beeb2824726b83632e70fdced9954331b83411170975d7375
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C92 10676 bytes
font_02_sfnt_off0001349d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1349D 16792 bytes