Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29bd785109c6086…

MALICIOUS

PDF

79.0 KB Created: 2021-07-23 16:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2a73ca03f11d60d505d5c8c07c994a43 SHA-1: 612cb737f3f9d1a9f4727cc41052864a10bf34b9 SHA-256: c29bd785109c6086ff28e3e984bed73c570f3e331039380c97f98882c7de9f34
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF's structure and embedded links are consistent with a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8784

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 https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ef053dc73---89589746032.pdf In PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/841ed692be05ee2453e6a005dab0c63b/23628960649.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/divuxuriwidezurisu.pdfIn PDF document text
    • http://rexant.by/upload/editor/files/nenapulanu.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/kaseduxowaluluviz.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/gudutibuzowobaze.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c566417e56b---13323770685.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/natanosaxegowumebiridagad.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2f30ec4b3---95007191227.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ee67a799d76---vagesanizalimoxule.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a14207d70be---lobigepanulunefutidepere.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609190cd28333---71991603957.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/7a2d02b5bdea1edb240fe0148e4ff3b0/kedesorefil.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/a031307b3e3647263df45c6ce0ddfd80/7109813008.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/952aeed30a8a2def815ca5c08ed002bc/33993367198.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/fireketudaxu.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/9c8dc89c6169f7fc4def24197f60670d/13906362876.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/loxun.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/pdohe3mq5vcde1cgsegs2vb5s6/34616941332.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16089834c820b9---sigijirabulepovakefesiga.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/32879707317.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6b4b25e8599dffcbc026c7ba7e4ce2f3/vexumobitebizazezediladi.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/7d89cad5700bf609c53dbe3e8c5e251e/kifexuwitunutuwuvibetufo.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/5482956b9175f2d6c2d954c5966ec9c0/junozobotomezuzatudore.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/lexosopedixawupolejuzib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+set+up+xfinity+cable+box+to+samsung+smart+tvPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1