Malicious PDF — malware analysis report

Static analysis result for SHA-256 318eb3b231dd52a6…

MALICIOUS

PDF

80.1 KB Created: 2021-06-27 08:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: f4fae7897c5808375e5e304af3310806 SHA-1: 597bb8a6a664aabe51a669773124c4ba9ac44e78 SHA-256: 318eb3b231dd52a68ba4590ed38062ed94eb4da0c92351cdda0c37b955e0cf44
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 and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, likely intended to redirect users to malicious content or phishing pages. The file's structure and the nature of the URLs suggest it is part of a campaign to distribute malware or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://huntic.ru/uplcv?utm_term=to+print+pattern+in+c PDF link annotation
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/c67bp6fglp7im8mk3qtqhand9f/sazumojaxurip.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/26347370682.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/67197829603.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/dtm5hnjtd5udgeioc6b3nuqp44/towekipufugepixutoli.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704666c4c81---66762668272.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/713eb7b58ea1d26cb2883736fbd62012/purevepubuginokeguf.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/90714120263.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/ad1f11c2775d9db66c050bd471785332/9953642840.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607629db7a172---ruseke.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210526205320.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7f00e0a00---27144952223.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160905586a6ca6---11077124514.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/gulevipotuwugojavo.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/hc8pegtvggk5ee2b7r8mj5rjn3/tosepaxuloduse.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/gurabafitinomi.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///wezugegojobixuk.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/d3mv6lnu6jgu95d3ghh132gsqr/novovagipu.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/uglggopioga1lv7leig8agmkuf/88423432891.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/3913b3982f4e94035033a02aa547f5be/fokuzizivobaderomakopebo.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c8999541f85---gezuzuwazawawiboxipiw.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/09e3bf839db1059e2b0898ec8129c0f3/69988968969.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88ad581ece---lefow.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/d884bc27a8ddc063f65fe74fd0769d2a/nadakib.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fb4891b7c---15981928342.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/bcf6f89d641019144748c20948d0b0b8/kawagusapodosomijebivawij.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD824 17136 bytes
SHA-256: e3429a3e77290c2ed0891d366d0d3b6f3d99590cd948c1d407e87aa22aae0852
font_01_sfnt_off00010483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10483 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9A 10116 bytes
SHA-256: c96ba74dbc65b04e36d24cea8d0c9d8ec90f5dcfa8c4a6ee9f51028475e6794c

Open this report in the interactive analyzer, or submit your own file for analysis.