Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2db99b3e6c0638…

MALICIOUS

PDF

70.6 KB Created: 2021-09-01 12:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: bc7783fa50ee6eff1ab1d2978903d053 SHA-1: 2945bfcbf7eff20efc4ff4b8d571367789209053 SHA-256: fb2db99b3e6c06381bc65397e70daade9edb07f87ceabf61ad7d999df0ef7078
124 Risk Score

Malware Insights

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

This PDF file was detected as a phishing trojan by ClamAV. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

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://allytemp.ru/uplcv?utm_term=how+to+manually+calculate+mortgage+payment PDF link annotation
    • https://cli-kh.com/uploads/files/202108181700538363.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/425dd91f6cb709768c188b0ad024f618/98286459193.pdfIn PDF document text
    • http://russia-ex.com/49824838354.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e0547ea8---safixej.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64424307468.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8f7ed3de2---lilomixivupuvesakupe.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/1hsv4cgj3uodu5s9ribv0p08j8/16566181447.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/nazaxiju.pdfIn PDF document text
    • https://majubesar.net/contents//files/wolenalu.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/dixojasigogemomisutom.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/31712263954.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f9d5da816---49508953407.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/8702037585a70f6c594beeb261123f72/95135622372.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/225695b467312bfc8ac98889de8dae83/88609385481.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106b6dccca11---55209729457.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0f8076b71---85224159264.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/kakavojo.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/tomudu.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/57073736899.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a5261571143---97922471304.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160db98d6cab81---68958912242.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/1624237989.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/e7ace9c68afedd974090a5482ea97dbb/fanas.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/rasiludewapobogamarujifo.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe082f106f---rorozanux.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/bcd953a6acd3982b4816955e9ad58be9/jiremafanodokozubidi.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_off0000d554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD554 17236 bytes
SHA-256: 1bd71c5cb1af1eade8135dce8e8bbd4b7e7d7ff93d3f457cabd2cbb3e3ef6d09
font_01_sfnt_off000101b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1