Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9b6edefda1d97f…

MALICIOUS

PDF

93.2 KB Created: 2021-08-06 20:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b49a251dff2b44e1ec4361dac8b6d4f4 SHA-1: 54fae78957046e17117bde1772eafa4358dce99a SHA-256: 6e9b6edefda1d97fbfe350a13c225eaaa4ede0bc86690eb2d09d65aa8091fd7f
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to external sites for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure itself is indicative of a link farm designed to distribute malicious content.

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://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/491e65f84fa670bc2a252124f3173631/54956936915.pdf In PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16095fc01a678a---xubezewudijizilibewafav.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16070a3863143a---vusajoverisiso.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/sesobarojurapapajesizurur.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/j8j8rvrjmg7goijbkahjub1lsi/gezisunom.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b07482107ca---58479763806.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/89e666c1040b203d0304b408f33a70b6/pidulijozedogon.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721d81091a0---wepapafusipatolujemig.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/3dc6acb2435e437ff4bdb59730ce1da1/wofusuzebepujivuxarav.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/nutuzobetejotomotopur.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a0910d9a7be---49150693130.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/23310888440.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a192ee2fc42---jotifaginorexegufu.pdfIn PDF document text
    • https://onwater.my/uploads/file/fuguxosixoj.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/92a61d614a605e267098937a6e43df4a/lijixo.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/nogubowalebi.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/a8d5vf2e3gsc9mvpmhk4mnff97/fililujax.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16100c0a59f85f---ribasudi.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/metawekaremani.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/jilakubawefezoxozepisinid.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/65214052288.pdfIn PDF document text
    • http://southwest66reunion.com/clients/f/f6/f6f8b7bd17d60304c359e527a2c43449/File/96551326852.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/borasenetaroxowix.pdfIn PDF document text
    • http://carszana.com/image/upload/File/boboroxulowuvorewijoxorix.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad09bd7ad80---49176623284.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=what+is+the+relationship+between+hardware+software+and+operatingPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001071d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071D 17504 bytes
SHA-256: a8932bb06415e3801ef79622637390c2e3f4bb7ed99e8b27348e77a04b788922
font_01_sfnt_off000134a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CBF 10996 bytes
SHA-256: f070144510dea3e3e10fa92779ba2ce5667f07321dc94dfe1568d0bcf6462933

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