Malicious PDF — malware analysis report

Static analysis result for SHA-256 82adbde2ad68527d…

MALICIOUS

PDF

68.2 KB Created: 2021-09-19 18:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 12ecefc0a7f5f362ddbd434fbda30a7e SHA-1: 5e5d723c492c4f7526853801aaa44f99595e44b7 SHA-256: 82adbde2ad68527d31a6203bc43be660c80d3313b76128ddde75279869455b6f
124 Risk Score

Malware Insights

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

The file is a PDF that contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting. The ClamAV detection and heuristic firings indicate this PDF is likely used for phishing or distributing malware. The URLs are designed to lure users into downloading further malicious content or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3555

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://krisoc.ru/uplcv?utm_term=fs+20+hack+unlimited+money+download PDF link annotation
    • https://petrovsky14.ru/docs/files/lazanukevuzipaji.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/70512936184.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/32170501641.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/kifuvarexewube.pdfIn PDF document text
    • https://servingltda.com/userfiles/file/16330220242.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/tifixuma.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/34709536730.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/40182728235.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/6e2fc448e1aeff1727e6a2aa228048dc/xufilijalelisulovemarufu.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16146aab4cd4c7---75971436585.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/solumeradedej.pdfIn PDF document text
    • http://polins.org/public/userfiles/file/dozegavopegunaxopidox.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/kitolelofejokuzo.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/rewabedokenoganajeriwufi.pdfIn PDF document text
    • http://meditopthailand.com/file/32988889378.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/68281326431.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161378f8478a42---finugumisekefazit.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/zusunedamadamukivuvo.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/69570239220.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/92579871969.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/2125774107.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/sosewowoj.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/5730338709.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/ziderotovif.pdfIn PDF document text
    • http://didopack.com/files/feruz.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/66036792324.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_off0000bf08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF08 11144 bytes
SHA-256: 396708387812eeec063ce5ff593448608659a3f374281517255f2a018cd57555
font_01_sfnt_off0000d905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD905 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1