Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e86e5a4d0ec8475…

MALICIOUS

PDF

85.5 KB Created: 2021-07-01 17:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b650f926360bdf1cf167b6a0d68169a2 SHA-1: 40128f6085802f341d060a564af530b3fd1a2469 SHA-256: 9e86e5a4d0ec84751e2fa1bae52c16a5c298252b61b87649a80a1ee1e7982318
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites hosting PDF files. Heuristics indicate this is a link farm designed to redirect users to potentially malicious content. ClamAV detection and ML classification confirm the malicious nature of the file, suggesting it's used in phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://nomylo.ru/uplcv?utm_term=plus+two+accountancy+textbook+solutions
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081717b11ab0---58930377783.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/89a3205a32bd23a3b06b6d267fc3cec5/dubuzusokumamig.pdf
    • http://pozitron-s.ru/userfiles/file/52729906751.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609502924fce8---jitanurixo.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606eef603b1de---jawupi.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a707f93b9ab---pifuzowerijizunos.pdf
    • https://baxsporthorses.com/userfiles/file/rajolusete.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/97cb1014506b6e6dbca6db8f5d9543dd/84885989366.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607754e88b481---61766739115.pdf
    • http://mygiftltd.com/userfiles/file/47742468108.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/bbe49764cf0e9fafede11ef5f5d9e5fa/dufosisefupu.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/237imaivt2dpoqh87624nkj4c5/5524775684.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/d147fe362f7e5f9172f1277c7c2862ac/neseberasulape.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/l73va0po4cufnrqukcpe88nntu/zilasomeno.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/f29a6b3fd2b69e28d48e736cbf339c88/38212726284.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5a30296b6---97828846048.pdf
    • http://livelyway.com/ckfinder/userfiles/files/zuwapevulebegopogekan.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/55ca337caeffe3ab62459c6f92d42cec/61305177616.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075edc143497---niriwabewitipubikut.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/hmnb25it0q4lana37ibgkiqi20/64357271164.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889eef74f89---dumuwemogemu.pdf
    • http://montaze.org/democms/userfiles/file/kajetenagukewaxa.pdf
    • http://thompsonhigh1980.com/clients/4/48/48b9e10b24f1ac3c627dfd5bb8c45987/File/98945060363.pdf
    • 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_off0000ebfa.bin
58dcd161263522d47d24113b1a7446e62b4b20a38dd7d1063e2a520d5071acce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 10760 bytes
font_01_sfnt_off00010513.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 16792 bytes
font_02_sfnt_off00011d25.bin
2bc7b90b1ee5a365109ad93c7cb4798d357d5c8fb53c07e116eb6ca3d8384cc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D25 16780 bytes

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