Malicious PDF — malware analysis report

Static analysis result for SHA-256 015f58fe24c6318c…

MALICIOUS

PDF

69.8 KB Created: 2021-05-29 20:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 612c1fd0e8fd77ed1c1a9a96ba0d93f5 SHA-1: cfd7ea8f65f3007725cfe94062e446537ba6f3e8 SHA-256: 015f58fe24c6318ceb3e1e7289f4c83ea6cdbec33042ed6112d91d18d67b765c
156 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to movie streaming, indicating a lure to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://coretry.ru/uplcv?utm_term=kabir+singh+movie+watch+online+free+filmywap
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6f2b8f5e6---12122915835.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/roldak23ulegloc9ivavt27p5p/tixemos.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/922a8449fb58f586f5bc74eaaf3b5cd9/xubabaxu.pdf
    • http://ottotech.center/userfiles/file/40947426397.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/6b0e98c006747276fd3e6f04987a6229/44947546209.pdf
    • https://pharmnet.cz/ckfiles/files/files/betojowiwatemivokitowin.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/77ef3843462a3183f60f0b43f758b68d/rijexomof.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da1c72fc61---rigolisekitivibiwesobil.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/aebe41f4a1265d7377210dafe58a7c2e/guranijezumeje.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf3a8232f---bexogujulupa.pdf
    • http://oticonshop.net/ckfinder/userfiles/files/49416015803.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/56822cae81b1eafa1de46fcde479a120/80334154267.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/fe94eb28d4b0f51e709516d13d0e5d82/nuwikoviwolubatavumekizux.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/2f41744f61ea9b5cb252e597cac4354b/fanuzix.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/u84790miojq0sm0uli5lv97ra4/90552828033.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ovo7ssomotu0vq599evds3cv6i/xulenogegawajas.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608632b8ecea0---32178698596.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e3.bin
921e25bd6481d06d52bf4ad6ba1e81b335a70540c9f03e029295893a1937ea66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E3 5792 bytes
font_01_sfnt_off0000ea94.bin
b01fe9df3572e64b11051dbbd843cb281d0eedfe1573331eaf43664dc887b221		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA94 10740 bytes

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