Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9930ff354b6935…

MALICIOUS

PDF

108.2 KB Created: 2021-06-25 20:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 762d419a1cadf48ac94b8bf68864bbe8 SHA-1: 3df85ecd1f1de8360d3d9cbd55ff9892f845943f SHA-256: fa9930ff354b693555820773ffcdd44e81618828e92bfa6894f5085ff511ea03
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6283

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://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/04a1c5bdff22e90d377b6ae78f3b6a58/57751446150.pdf In PDF document text
    • http://amandatravel.com/userfiles/file/lutorig.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/xovidafit.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/papegesawuxufazuwa.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc4ca6b8ec---15829702077.pdfIn PDF document text
    • https://clinic4lab.com/upload/ckfinder_temp/files/20210623044144.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/7fe0fc59fe829ee897dea035fe044233/fejowibevejipis.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/moralepolemar.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/6qqmo7j1pg65rnsm3ren0t8cp0/88219191249.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f88c9241fa---toturipobexerev.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160798058ecc54---wulorisigumazolenuga.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/11265625029.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607568d568f6c---26253061976.pdfIn PDF document text
    • http://www.heksan.com.pl/file/48322274765.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c32253b3f23---wugesizedafetokamajogibo.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fbcb42ac3---mazuxuburus.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/vuziloniposoliraramodexu.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/faa9548909ebf230a1f38b0ca7582473/dobirevewedewe.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761bae0e863---ruvesewuzuworejigimijekon.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/25707704233.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4d672cc4c---mopijabara.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/31205c9abe209d72e3840f5ecc9454a2/gofogad.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/bfdc5d1d67328f3a4a59b66686ed88c9/14433703470.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/544637c9db600abbc1a52de72c2d4d41/78446885498.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=selection+and+projection+operation+in+relational+algebraPDF 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_off00016a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A63 19560 bytes
SHA-256: afe31f00e3ce948397768003e46f02b8aa40f53345b653477972325d817ad632