Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e694d20c4665ea2…

MALICIOUS

PDF

92.6 KB Created: 2021-08-09 17:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 592ab2646401ade2b60e891ece4e20ca SHA-1: b1cae742c03da799087c76c4611fc948c6fdfa68 SHA-256: 3e694d20c4665ea228c9ed35a5a15e5d9a29490084862c992ad9a0ebec895ef6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of numerous external URIs and the overall structure indicate a phishing or malware distribution attempt.

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://pistant.ru/uplcv?utm_term=hum+saath+saath+hain+full+movie+in+hindi+download+filmyzilla PDF link annotation
    • https://laser123.com/geektic/files/padawuladep.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/7a7613596bc6f9d378cfe78d06fb1e71/37961882626.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/givofoju.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd17598667b---zivutekufejo.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b101269c70---dusiv.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076b5cfdce75---motunopelowiketagekexiwo.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082845f5fc31---winefododakelozuz.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/502947348.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/nidunekob.pdfIn PDF document text
    • https://wittnebel.dk/file/ziripuwoxukupanidonad.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/dgjulmt2o996a19i42o8odt0ec/lirurepapanavarovasedut.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/tivexozatiketafag.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/samefot.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bbe2cce10---87753390097.pdfIn PDF document text
    • https://projetovm.com/uploads/files/20723425060.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/4284576197.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cb524b3d774---bevufomugobavok.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/62b150bad3d7e8cfaa638b9eca1926b0/69729074952.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/geremawoxa.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607c26c1a2907---9006491338.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/31084111149.pdfIn PDF document text
    • https://congthuonghotel.vn/app/webroot/files/images/pages/files/fabuwimetenamejefumu.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c69c056db25---61612074209.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/3fcf06074897775b755247545284d616/16885919844.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_off000104c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD2 17720 bytes
SHA-256: febe251babf15c6654b32eaeb162b7ae97b6fe210b202b6d551ff817eddd27c2
font_02_sfnt_off00014a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A2A 10936 bytes
SHA-256: cf522df8cd5e680f0e3ee8bba1483e10a8c844219b2c26037e07d668de8010b3

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