Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c729a842a5852ff…

MALICIOUS

PDF

84.9 KB Created: 2021-07-09 01:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 927ec48772a965faf4bd2cb5653580cb SHA-1: b2cf8c60d02449558852562ec4f0f744eea6cda1 SHA-256: 0c729a842a5852ff418e14f5f8efbd2f7eaf0eb2306ccaa212e6f6cd96a5bfb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains a link farm pointing to compromised WordPress sites, suggesting a phishing or redirection attempt. The presence of embedded URLs and the nature of the heuristics strongly indicate a malicious intent, likely to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=the+face+of+imperialism+pdf PDF link annotation
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/2041b016f7b260bd1f0eadd152618b2b/jatulogezovusupusasoli.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/71607264847.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/69c5e634e462b67fe78840fcb7c201b3/82547185474.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/xukoxidijunijekapu.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/f3ed74a7873926c49a162ba9e2a5a2b3/45266997160.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/67358969447.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/28it3ui6bin3hadfisafkaa353/tozujuwuxojuvam.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae022372a1f---serewidizufijezojofot.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/895c9f31e82342e4d7725b632a2cd761/puwapa.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/vasazesagizezubejuneji.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/betezuniw.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fd423b1e5---bejowijepi.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/97195784479.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/b072b8cda1a1868263efef6755535829/mobopexid.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e08f85e84---xejal.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/110020966dd2b2620391caa43d074145/22816197977.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/11265625029.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/musezapinozusumora.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/dseb22gkr1gmrgotcgfm9v0k30/tepumolanupa.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/36384036228.pdfIn PDF document text
    • http://airetechservices.com/userfiles/files/4729732637.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8168a71fe5---39795053552.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/zererajidijano.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB25 16856 bytes
SHA-256: dc07cc7c44329d7d950b7a7236301c6c35ad651e4ed39a1748f09386d153e2cc
font_01_sfnt_off00011702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11702 10648 bytes
SHA-256: 7b860c6b10867e678a62dc6481a9e3454b0ee3b3aaa8be35a69567d89393e47d
font_02_sfnt_off00012f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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