Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f0fe4ee04ef5c8…

MALICIOUS

PDF

91.5 KB Created: 2021-08-20 18:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 53b44532ee16f9d45c797dfd9b4bc583 SHA-1: 1d2bb3ec857a4b82537f6c1b10fb9a4a5711d2e4 SHA-256: 29f0fe4ee04ef5c879e4d3fe45972a4e68ca179428953cb6bf5c2aaf6342e929
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely serve as lures to phishing sites or downloaders for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

Heuristics 5

  • 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
  • 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://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/b5dajklf98kd9vf6tsdbfr53l5/99704603130.pdf In PDF document text
    • http://monkey-do.net/userfiles/file/23131703414.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6353b2af6---dofigaxomigobunapimewi.pdfIn PDF document text
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3d54affc12e088a9e4433774a9d10cf/42409032087.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c49b0f50140---midulogajemukuwuper.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbadfb98f7---pebunobi.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/36f8e2d46ad8d3fbd57dd849e17197f5/75426069704.pdfIn PDF document text
    • http://tencanpowder.com/d/files/15820300479.pdfIn PDF document text
    • http://sun-tes.ru/files/file/29556993686.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/12d4b7cfe22f2ed8b0cb2d9697a4e0f9/guvarosa.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e53202417---laropotowebosudimupal.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/8ea7f6ed26a7b8af7a9fc47cc49b9499/pemokibovanovanadataja.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/adf85ef5b4cf44c08c7e455ec8863a8d/22093845649.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/jbg8embaenujnbqd4a5mvqiubq/wejilavefugolu.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/64269008476.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/97564947512.pdfIn PDF document text
    • http://willbramephotography.com/rezorovikozu.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/109d497ee5247c7f214f09317ef3fa9c/46613353918.pdfIn PDF document text
    • http://hk-keber.de/images/file/20360989373.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/117ece0e796cb72f1a4a59fd6e44ed3e/duxegidog.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/50885217751.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608b417249014---5465802185.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e42664c9195---siluvomakulataxeb.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/tunurexewadix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+much+do+overseas+basketball+players+make+in+spainPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3D 11368 bytes
SHA-256: c763aeec69e179cd1e3d4b1713b01024d97d0ee004fec7b211470461a9df9182
font_01_sfnt_off000149a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1