Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeff4f4d09d16b06…

MALICIOUS

PDF

72.0 KB Created: 2021-08-19 14:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a23a3421fd5b25db915760138f4cb705 SHA-1: fdc8f82f229c4f82396d8ab6b2ffa3a8781dabf5 SHA-256: eeff4f4d09d16b06adddcb1f0a18e017fcd50ff00ff24bf74456ed4764a238a7
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or are structured as link farms. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or distributing further malware. The document body is heavily obfuscated and appears to be junk data, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8991

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 http://chikatere.com/Upload/files/53303691825.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/3e949f8df6e19aeca067ea674ae521f3/vujulakobivi.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/b3e897a0d7456973e9eed34ab2966b9e/4276198508.pdf
    • http://tekizolasyon.com/ckfinder/userfiles/files/pigodut.pdf
    • https://franchiseharbor.com/files/files/gifexot.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/3342c322d21323d0e392dcee48db9867/vedovawoxalosidodug.pdf
    • http://shinex-auto.com/userfiles/file/76956218885.pdf
    • http://aucoindeshalles.com/menu/file/23430768965.pdf
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/mogimemusomowan.pdf
    • http://sevimticaret.net/userfiles/file/lujimuke.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c3f9846e6---tesexuzomafetetib.pdf
    • http://textingrights.com/userfiles/files/gebakagojos.pdf
    • http://juncheng.tw/upload/files/nerawijegubugekaxewazove.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160990c717a8a5---mekupilafas.pdf
    • http://www.deco-interieure.com/userfiles/file/xubudoturukume.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16102be36ca782---xavabe.pdf
    • http://medtravel.pro/images/hand_uploaded/files/fuviwewanekoduzapel.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608494cb235f4---99070285063.pdf
    • https://faresaldabbous.com/uploads/files/65334224212.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b29194285---pijepogovebidisu.pdf
    • http://obermeyer-modemarkt.de/upload/file/xunidubexib.pdf
    • https://www.igescanada.com/ckfinder/userfiles/files/lubatabonexeviguxa.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160736ec17fc7f---gudilabamirol.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094db2750a57---fisupikakunitusunedulukad.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=dfs+cdma+17.10.02+tool+full+crack+free+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e893.bin
842c50eff8dc16cacd4cf04771a63df1a47ce0c1bb6fa54c3098b38d3ac03d17		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE893 17608 bytes

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