Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb8fe5d09897e2b…

MALICIOUS

PDF

71.7 KB Created: 2021-09-13 20:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bdcea9038984223a264f63da6a663611 SHA-1: f55cf459a1e72a431923eb4763382775fa2d1cdd SHA-256: bdb8fe5d09897e2b1ee25d56db5be5261a3372087f6935c0131724f406cc4004
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress upload directories or disposable hosting. This indicates the PDF is likely used as a lure to redirect users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da541a1d69---42099752623.pdf In PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/sisef.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/32508184793.pdfIn PDF document text
    • http://jobcred.com/rk/jobcred/uploads/image/file/65655179057.pdfIn PDF document text
    • http://fnathservices.com/upload/file/50237098694.pdfIn PDF document text
    • https://dyaa.club/uploads/file/mebajinupuzemutikojuv.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/morubovo.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/a71f36fee411f5a38b0466d6f6071af9/junidilogemojadisugokali.pdfIn PDF document text
    • http://dongphat.net/upload/files/rudidelawataduzidos.pdfIn PDF document text
    • https://wasael.com/userfiles/file/dujumon.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/bedaritazejofiso.pdfIn PDF document text
    • http://xn--4k0b43gkwo4gn.com/upload/editor/file/84553033098.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a38113460e---44679487375.pdfIn PDF document text
    • http://siddharpeedam.org/userfiles/file/In PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/tupiporakepi.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/nejerugegemobemusuwuwu.pdfIn PDF document text
    • http://gdfsztal.com/uploadfile/files/laxedexofukagomuvabewo.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/19818402652.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/52297813031.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/1cf11b6b7777b05eb89655ee7b470682/66939008389.pdfIn PDF document text
    • http://biosystech.com/pdsFck/file/79852026883.pdfIn PDF document text
    • http://kantipursecurity.com/userfiles/file/55805019131.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/b6b53f1abd01e3eec36ed8c7830dfdb1/nuxatuba.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/17ea85923f4466d39a8e8c8791cfd984/17330287797.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/munudetikigon.pdfIn PDF document text
    • https://noithathoaphat11.com/upload/files/18267852933.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=housefull+4+online+watchPDF 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_off0000e55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55E 10588 bytes
SHA-256: e4bb63f4ccc1824092f2dc4b45e0b0400552879a5c7edf966c0eb3153eaafafc
font_01_sfnt_off0000fd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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