Malicious PDF — malware analysis report

Static analysis result for SHA-256 38107d695dda3c76…

MALICIOUS

PDF

86.1 KB Created: 2021-07-20 19:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b0610dd73bf801f3ed532bd8d5a3a7a1 SHA-1: 3b1b6ec2cb0cf6b224f4eee03bef13e6c91defae SHA-256: 38107d695dda3c76757e21aa5668a27e4059b56dd0cdef97b47e076ba55fe5ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or redirecting users to malicious content. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://wagnerpc.com/userfiles/files/kujapipakopogo.pdf In PDF document text
    • http://abwlargo.com/uploads/files/jijoxesuteketenikes.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7936a5b37---fufifageni.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835d38d6f3b---misejalukabixax.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/ou0si2m3qt26et6lju98rhnlhp/mavet.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/zozeteku.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/80819380202.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/5af7051b530dd7d2941a621dac4c1560/mujezomekanigosinik.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608c425446c4b---wubemaxuniwixeditepefu.pdfIn PDF document text
    • https://mfdesign.hu/files/file/gagudutabobep.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/251500671.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/vevuzimulijamodusazane.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/88fb3c5f7190123d8ea55050ae82ba0b/5025155386.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160836d74e0d6e---juxilixexorenasedavu.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607fca4d8fcfa---78261099625.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/5128cad292a08c2269969a36464c23d2/90978823206.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/62824134697.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/nixasomonofetajaver.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dff767ace9---78674272820.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/j5163t1pbheupmi67kgu7c3n64/xepusejiligitaxogulu.pdfIn PDF document text
    • http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/bagikamoxef.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/xafekowulunumixilaxedabub.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/6bc1ab65866721a9c3ec93df5d2aff9f/36149113744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=prolapse+of+uterus+meaningPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 16616 bytes
SHA-256: 6476a74b5807ef22ddaebe1ad90bf851bec6d174c860fc5c18f00e3bc0b4395e
font_01_sfnt_off00011a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7B 10800 bytes
SHA-256: ac215efcec570a675ab5386ab9c7a1b6afc0e31563572f5ef4b5e172d27a77cd
font_02_sfnt_off00013362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13362 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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