Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4dd08e017934741…

MALICIOUS

PDF

125.9 KB Created: 2021-07-26 00:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 88ce70663a52944233d7a13e900f2198 SHA-1: a6c68a3380380109b2c3d9118393523aa471e750 SHA-256: e4dd08e017934741db9eb5be283bdbf73d76c291d49003de8f607a0b6357f095
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating it likely serves as a phishing or malware distribution lure. Heuristics identified it as a link farm, with many embedded URLs pointing to potentially compromised WordPress sites and other disposable hosting. The presence of these links suggests the document's primary purpose is to redirect users to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6513

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vanlysecurity.vn/vanly/album/files/28842381362.pdf In PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/d4f56c3b01e7eb9c7c0c0f8a870699f6/rojesi.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/vorofev.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/nulabaradolasokagir.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e24449b4dd---97906967394.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/6746cdfc07f8e32e03e12c7deb9601f0/45274429929.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/59826647406.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/90135287582.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/5ebd7d70368ce2c2d8e0d451aa8702cd/fipixos.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/dgo9f040qrbg6j4o388h3oi31a/71059677418.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/95754096168.pdfIn PDF document text
    • http://thefjordbaklawfirm.com/clients/876731/File/98410687528.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/5315727710.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/1a77be44bfe11fac7e5589adb4ed9551/fizisekubuwidavixamizifo.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8747520191303ee8d5878fdbd7e1f11/6011475985.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/6488922022.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/saxefesuzerefo.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/419878386.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/92690758329.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/26798166314.pdfIn PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/pufamanifuvefisiji.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/vewozamijozokanidaxeju.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16091c07834255---47524365772.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=daily+reading+comprehension+grade+6+answer+key+pdfPDF 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_off0001d9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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