Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebb14db8df20ed9…

MALICIOUS

PDF

62.5 KB Created: 2021-05-31 20:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 469f575f107145824e958c26dbd147df SHA-1: 47be6f4d01d6aa8132120c562a041bc4947f6185 SHA-256: 9ebb14db8df20ed97ea7cba3b050419a578125965e95dad8e585b49e157c1874
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely serving as a distribution point for phishing or malware. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7615

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://crewmak.ru/uplcv?utm_term=exercice+triangle+semblable+3%25C3%25A8me+brevet+pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608b97a96977c---jupusojemunevapazurux.pdf
    • https://binarbaid.com/public_html/userfiles/file/23392920829.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/9mj73gjld5pu2u1vf6abv6cbu3/17360993349.pdf
    • http://rauvuonsach.com/images/uploads/files/11409841166.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ac1b21428---bofap.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/98390c98ce665a0317e932e54bbe10ec/vumomusudagunepix.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607069aed3d3e---namutamusate.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/ade88970d99b54cd466f81320ffa171b/43196981023.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/b0bd6733febeaa0b68202d2ff55f1ab6/37321773959.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607f26370e822---wonenasifamazerepimurafop.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/3b1016eb0adf1f847d26f37300007001/76461225132.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86bfb13bb---42821365416.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7d165e4bc---ribapogagawizabavalesow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/ce12527cd2c57f50fe9a2be690d07e3c/mimodijatur.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d03a.bin
377189db2fab55fb3d8d097b4f1c717865c9ccf9971644c452e0bae48d99bf3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD03A 6004 bytes

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