Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c61fe329db52ff…

MALICIOUS

PDF

76.2 KB Created: 2021-07-13 08:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 95b2e5fab85d95c34833f6a82080f6ab SHA-1: ee9bdb32247931fa8367d63255e6301c0f22693f SHA-256: f9c61fe329db52ff80a3cee5ab6a535663583aaa34c88617f5a05ec6ba8bf434
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. These links are likely intended to redirect users to phishing or malicious content, aligning with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://nomylo.ru/uplcv?utm_term=he+delights+over+you+with+singing PDF link annotation
    • http://brainbond.ro/userfiles/file/fupibafisola.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/f7f9c53f58dd7a72c133cd9c7307873e/21455912000.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/8908255816.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/f0eaa7d0636248e2e63592b64c0a9858/pidomeri.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d1ec0f4e5---niwujasixaloridozutikad.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/gomojaso.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/wuxefozujiwutibeto.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/4782709085a58a000adc38f78a76c905/12087966615.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/matolojojufamugusipu.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/6a06bbb5412be7d8a2b71cac678e07a5/96990831267.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e5c3eaa85---tejawugijaxusaga.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/ropelupaxaje.pdfIn PDF document text
    • http://xpressup.com/userfiles/file/31909830621.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/e775d2a90373c153a85d0fb116ed8e84/kalazeketodoxew.pdfIn PDF document text
    • https://mszukam.pl/dat//file/negilapibotegovupodaru.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/nenazolurefasitoxavekip.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bbdfaba25---51657951703.pdfIn PDF document text
    • https://advik.net/userfiles/file/zaferurufuzex.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c09a2046d0---risufagogajujasuxije.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d9fda82a3---ribakote.pdfIn PDF document text
    • http://deltools.com/userfiles/file/dolekigopipidokopiruzevej.pdfIn PDF document text
    • http://standardamulet.com/files/files/46686394268.pdfIn PDF document text
    • https://aeternoplanning.com/ckfinder/userfiles/files/6272360962.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/bixalunolu.pdfIn PDF document text
    • 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_off0000e61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61A 16696 bytes
SHA-256: df8f5baecac17cf987401e308b88350433ae40690bdd3bc90d2b4d4a39bc31aa
font_01_sfnt_off0001118a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1