Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9029e7111f6f0b…

MALICIOUS

PDF

91.8 KB Created: 2021-07-24 02:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5f4add43d0b24e5743711ce5b79fbe8a SHA-1: b16e470bb7d84432ba646642abd3e2eac2c405dd SHA-256: ec9029e7111f6f0bcb0e7a93b8da05ae662b6afca82cb90ace6c269b5a9e9c86
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV both flagged this PDF as malicious, indicating a phishing or trojan distribution attempt. The primary function appears to be directing users to potentially malicious content hosted on various websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://bamor.org/userfiles/file/naremedetogafixewomes.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a77c01f19---73697097336.pdf
    • http://moscow-vernisage.com/files/files/lebofibukasodibitajexor.pdf
    • http://amirafouad.com/uploaded_files/file/90133657848.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb614a2db0---45295444342.pdf
    • https://komunalno-vrgorac.hr/files/bizenovemijigewawetezujo.pdf
    • http://www.contal-farmer.com/uploads/files/vojinavub.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/r394jlkfjtk9acc79vhv9u5232/nagapokewoviko.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1de49c83e0---sizafejuso.pdf
    • http://microlana.com/ckfinder/userfiles/files/venozasigare.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/9lkkh8nh010btu9k7dbpfbcq8s/zuzifowep.pdf
    • http://oishisushigd.com/uploads/files/14101610745.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/05cf67d3eb17a9f850bbfb2a2f691dee/27616051419.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f04a3bd34---jefuvitaxupelizosox.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b19188bb2be---monorirelegat.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa5d707c75---92337152508.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071e8b181d60---tadubizerawep.pdf
    • http://budohurtsa.pl/userfiles/file/6081327098.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c66e9c91f12---polenivubi.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9026162bd---6550155028.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/c6ccfe7214ef828ea7ba7d620ffadbde/sebegofegabijimobaf.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74f4b3c169---judegolini.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e931e0446cc---70617009510.pdf
    • http://tantex.org/tantex/tantexuserfiles/file/rijosekexoleva.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e21ddafe0---48450085049.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=what+is+carving+in+art
    • 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_off00010516.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10516 16792 bytes
font_01_sfnt_off00011d28.bin
d6c9d061f20904e19dc4bc0df92c743b9cf6198708d25c2eee5cb954558a6162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D28 16988 bytes
font_02_sfnt_off00014932.bin
1c3447cf93a06303d403e889ea3fdf4a54c2f7fcf8614b802f440f120748622d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14932 10268 bytes

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