Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e6ab91f7b9b9ec…

MALICIOUS

PDF

97.7 KB Created: 2021-08-04 10:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 558ad9b3ac997f7b01c869adf2bddede SHA-1: 8d36442888ea1cb4dc6c2211619d25acb7653e84 SHA-256: 80e6ab91f7b9b9ec103f256ef8c529e7fd928c53d16bcb4625df77e3974c6b86
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised websites, suggesting it is part of a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://pistant.ru/uplcv?utm_term=como+activar+comandos+en+sketchup+2018 PDF link annotation
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f05e84d2e---berigevitexokowotaxamatit.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/23623930141.pdfIn PDF document text
    • http://investbuild.ru/var/upload/file/lijivojeleporedafexirot.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c1834781b---98691222206.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/89002959109.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/2hoimr076qsss1l8i57io3s7e3/jebezoxesu.pdfIn PDF document text
    • https://ovth.ch/userfiles/files/45838505367.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096012f02571---dadipolaxejepo.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/54475800666.pdfIn PDF document text
    • http://balone.net/_upload/file///98718329664.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bomanesulugosuvad.pdfIn PDF document text
    • http://simonide.org/userfiles/file/busis.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01f7f886a5---mikurawivuvizuremo.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/dojap.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f29a03b511---83765056320.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b12f97d9d81---makoxusogugisawedijujowa.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/mofumetedaxezalukosej.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/89458233621.pdfIn PDF document text
    • https://info-jimukyoku.jp/lot/upload/files/9194934701.pdfIn PDF document text
    • http://allasclub.com/campannas/file/46025936092.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/34925018466.pdfIn PDF document text
    • http://maxbrio.kr/files/files/rorijepuna.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e2a598660cf---92323575346.pdfIn PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/xipabik.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B8 18676 bytes
SHA-256: 3a315b6d46049cb48e892ebf39691a0a20444d8d6b1a209a8782c35a5eaeca14
font_01_sfnt_off00014349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14349 11524 bytes
SHA-256: 37ed1f1f03ac86ea4d6cf898c71d9c1ec0840d13cfdbebfb39b20a4af869d5a1
font_02_sfnt_off00015e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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