Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2c4c621a276126…

MALICIOUS

PDF

91.0 KB Created: 2021-07-01 13:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d3183ba68d87030945b7237c413306e SHA-1: 29dfefffc2f28245bce087dc92a3aec369d93a6f SHA-256: 0d2c4c621a2761267dd0cf4ae832b6d7dc0f148810beb806abd8c639697f65be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites utilizing formcraft plugins for file uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The document's structure as a link farm on potentially compromised infrastructure supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086fc94b2e1b---nuretubegefuvevit.pdf
    • http://euredit-editions.com/userfiles/file/mokilarivezokefifaxusoro.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/vt50dg1k295pnbtd9am4da9moc/99455559055.pdf
    • http://www.contectrade.hu/fckfiles/file/komavetamawivemenaruw.pdf
    • http://billedbutikken.dk/articlefiles/file/pinekupevuposemip.pdf
    • http://shosholoza.de/file/73222456552.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4a4247f28---61763163945.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608023a8085ba---demedevexage.pdf
    • https://mudraconsultancy.com/uploads/files/kanederukavolumup.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/p0sp9rogva4clodp0ft0kaev6c/wegasotenudijofiluturobul.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/533aa75d0a4d3eab7a7812086d0c75bf/49763768025.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d617d5dd3fe---migefux.pdf
    • https://101doctor.com/uploads/ckfiles/files/60b387430cddf.pdf
    • https://nada70.org/userfiles/file/bovefomuzezukeku.pdf
    • https://pmsp-me.com/userfiles/files/sinesujovetasusabuf.pdf
    • https://shidoremicrosys.com/media/pidukarukufugamesujajum.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/1kgm7dgfuuk5us6j59enl5i0lu/60366393390.pdf
    • http://sarljarry.fr/userfiles/file/97038844597.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/t2ln6f6pk50fk991nju33sp5g6/novemuduzirotanebude.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/dab141fb225d754f588b13da8719767d/95598160387.pdf
    • http://staresecurity.com/userfiles/file/20838229524.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/20454c74904af57498dc2e282599be5d/1204505602.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/b2b9b9td2djlasbupeoqnpekq0/xevozudagipojebugil.pdf
    • http://ck-kutnahora.cz/gais/image/file/71635028941.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d719f8a7133---74745015334.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/daj0mq61v85g3rmvkmqdfmjp33/rimebe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+remove+sharpie+from+white+shirt
    • 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_off000102a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102A5 16792 bytes
font_01_sfnt_off00011abc.bin
541d33a8c63097918531a6a62a78e4d8757796d782496fd668f63260f5e790e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABC 10616 bytes
font_02_sfnt_off00013313.bin
b6682910c2fd83130b7ba4b5ace491d7b639e139217fccb39043f8c2ed3c788a
pdf-font-stream PDF embedded font (sfnt) at offset 0x13313 16668 bytes