Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5119cf050a787e…

MALICIOUS

PDF

82.9 KB Created: 2021-09-05 22:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 954cb9f7c68737cada0729f82e5faa9d SHA-1: 0107388e048c2890195e692e9f64c1935356df27 SHA-256: fc5119cf050a787e96500d6770e9623b26c238e8ef9cddafc36e6fde1d2eb65f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common tactic to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ketchas.ru/uplcv?utm_term=environmental+laws+and+policies+in+nigeria+pdf
    • https://worldcastlive.com/userfiles/file/52792386351.pdf
    • https://aparcaderoshaddaichile.cl/uploads/images/files/23665333370.pdf
    • http://onlineexpert.in/userfiles/file/vitilalabisaxogope.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a271af84a8e---nekezefazitoxe.pdf
    • http://tce.vn/imagesflashupload/file/moponuzitulusabenaza.pdf
    • http://faurerom.com/userfiles/file/vogexefepurokoja.pdf
    • http://vzwsportenmuziek.com/content_docs/fipixawenejafiwo.pdf
    • http://gyobel.itpublic/file/zodefipubawurixegud.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b04bb6279a---77101569070.pdf
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/15690278135.pdf
    • http://unseretochter.com/images/file/68862099897.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b95742c960f---rawizikokapotagilekinez.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//82683601946.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d28b64204---mutiruleraparisavasiz.pdf
    • http://jrpst.pl/userfiles/file/90804603721.pdf
    • http://kingsbrite.com/kingsbrite.com/userfiles/file/fotibosexozox.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e90c1b3df40---munumururot.pdf
    • http://stellarp.com/userfiles/files/70348393676.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16112bed25bd3f---divukexefejaboz.pdf
    • http://synphabase.ch/upload/file/tidenen.pdf
    • http://studiodabo.eu/userfiles/files/40451761769.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e42b5105ae---54980925285.pdf
    • http://arniuniversity.in/ci/userfiles/files/tujidubit.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a57bf5048a---39082040577.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de47.bin
67595c5b926d7e025ae960825c2cf12612ed4b06bdd0a108ef99206ce5336cf3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE47 17808 bytes
font_01_sfnt_off00010bb1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB1 16792 bytes
font_02_sfnt_off000123c8.bin
65488214214b9db674809c9e7269a7c7fc3042a087e389e1e244e715bce9a142
pdf-font-stream PDF embedded font (sfnt) at offset 0x123C8 11100 bytes