Malicious PDF — malware analysis report

Static analysis result for SHA-256 0edcd45826d58bbc…

MALICIOUS

PDF

106.0 KB Created: 2021-08-11 20:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f2d507dd788e238b37f4e85566fb29f0 SHA-1: f93fb506fa4e225c6081244a7197d6300d9f613f SHA-256: 0edcd45826d58bbccc893e596ebd340e70b93503c3babe9ccc451167c24421c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to potentially compromised websites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a2e1837c5---dumalajilipexezikopar.pdf
    • http://kasystemofkarate.com/clients/861259/File/57863204645.pdf
    • http://educasters.co/ckfinder/userfiles/files/pujozore.pdf
    • http://poltinka.ru/userfiles/file/taxunij.pdf
    • http://www.rpv-drachten.nl/files/file/63391360309.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9101b67d2---dotitolodagunil.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16081127919195---raluvuva.pdf
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/38085335806.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0554041095---lovisilejutujajof.pdf
    • http://deborahkay.com/ckfinder/userfiles/files/silexidaxubebaxas.pdf
    • http://xn--9w3b11kh5l.com/ckupload/files/datukogepomilepol.pdf
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/sakadatuxolakefejuxig.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/00694dd092e5b71e92c06b714d45a7e0/34410114676.pdf
    • http://praconsulgroup.ru/pict/file/5773415582.pdf
    • http://vipnovini.bg/root/f/uploads/files/58692192733.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/gl0cjvajabksvnkecpfs9d4fu6/16608495321.pdf
    • https://jbdclothiers.net/emailer/userfiles/file/ranopojisaze.pdf
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5186202233.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/6rjpptv3rp80njh0rtfdd8njt0/35975170211.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a517894d931---6950418514.pdf
    • http://diversecityuk.com/userfiles/file/72654149278.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/cbi3r7fiqvni6mq2rgoqlrm59t/7661333986.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/7d5744dbccd885f03aa58d101fe1b408/26826885157.pdf
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/4hfat9apadpbatn6crs2fdjuev/66066426099.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+pair+directv+genie+remote+to+samsung+tv
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013724.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13724 16792 bytes
font_01_sfnt_off00014f36.bin
99114091d9fcdf5819916406e0eea1aa2a6a2d8c9b5345e857493fe34d37ed38
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F36 18284 bytes
font_02_sfnt_off00017f45.bin
e13d3177f70d24624bc980d0abe98ff8f8ce7b6f0df47b6a56e3af68d04ed78f
pdf-font-stream PDF embedded font (sfnt) at offset 0x17F45 11052 bytes