Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c32050eb12840d3…

MALICIOUS

PDF

86.8 KB Created: 2021-07-17 18:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f5d8aead33bb690eb46884672769b83 SHA-1: d3610bd3bb5fb9eccfaf5a04c0ef5f5c0ed1c030 SHA-256: 3c32050eb12840d3caf3797f38205021ac093630d9e5ae5f34eb65d530d10f97
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://2ds-creations.fr/userfiles/file/nilorovizu.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608656740910e---7822893832.pdf
    • http://deeringbayrealestate.com/userfiles/files/fipisitelasebifomumek.pdf
    • https://nestsearch.in/admin/uploads/file/likozunovoruzut.pdf
    • https://cardion.dk/gfx/fckimages/file/18918060418.pdf
    • https://agronlogistics.com/userfiles/files/xinem.pdf
    • http://wellnesszeewolde.nl/site/data/ws/files/48236150762.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/2817f9a4ce43ec451cf185e2673937ee/94854039148.pdf
    • http://andlupa.com/userfiles/file/6166364775.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b25977cb7fe---lometujolemunogisarez.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/95616e167b46262caf31219f611411ee/63046864206.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/n1g8r48r9gpp3tjogipda24csq/fidamatogexotuvubanoru.pdf
    • http://bora.su/ckfinder/userfiles/files/81553146622.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16081112e67a0f---barib.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609459c45407f---33819956542.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0cad6f724---44994118665.pdf
    • https://publicbridge.pl/userfiles/file/vufulo.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608952c4e45ca---jikefomawi.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c30098526---zaviwugemojinakibuge.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/f751e25455650d671a7a87cd714c3654/65284492771.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc747b60a8---28265632084.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/14b0096e3104c3fceedf065204023458/13902340571.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b14d469f72f---rugakazexikuxijin.pdf
    • http://e-skala.pl/userfiles/file/pegirujefukesuvufijeg.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=sting+and+his+wife
    • http://e1pl2.nazwa.pl/busy/fotki/file/47761380491.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_off0000f367.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF367 16792 bytes
font_01_sfnt_off00010b79.bin
568501607b0aea58e14f443f57a2d9068934cdcb2c1a6edaaba8873a1176a457
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B79 16508 bytes
font_02_sfnt_off0001365e.bin
71b0e2db4f8d9ee6f076cd90a599a75c82d5f969fba05dc7ea74f8bbf3f4d202
pdf-font-stream PDF embedded font (sfnt) at offset 0x1365E 10528 bytes