Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de0f4a9b35d05ef…

MALICIOUS

PDF

88.1 KB Created: 2021-06-29 22:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 33176f4a360928b7f30a7bb3d4f3c879 SHA-1: ea5f570d952b20c0901bc07cce6c062494be265a SHA-256: 9de0f4a9b35d05efff994eb5b1e210db6aa72ecfad99eabdc941f7c87915e0fe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to compromised websites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the 'SE_INVOICE_LURE' heuristic further support a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/936093c1e72463341fcff4397408b6ea/70370506709.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa518732b16---waverogifusib.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/26kfnpfatulhponjo5m81g9dmf/2351022215.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c876384bff---96515532012.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/nnbgd95lapn99kapqoecbd5uk1/govamolanofibizago.pdf
    • http://malagi.pl/user-files/fck/file/jawewijabanagamomo.pdf
    • http://bjhtdszdh.com/v15/Upload/file/202151481758518.pdf
    • http://csc021.com/userfiles/file/20210612085055_2ltzgb.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f110ff2b21---12100903274.pdf
    • http://yaeram.com/userData/board/file/23609082616.pdf
    • https://kaptenhoki.net/contents//files/52219899707.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/6ce10d45f5ff2fdbf2206287e2501b2d/86522996584.pdf
    • http://efrex.cz/files/file/72839451288.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/17a290eefa931de9d60cca59cb6ebb94/77132214512.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d22a70b8ff1---23633053404.pdf
    • https://tecnibat.net/uploads/archivos/92962834912.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/s7qj01ipds73ct9a9g1db1v8n7/99154215695.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b03a5e97282---jeferam.pdf
    • http://muzeumostrowiec.pl/obrazy/file/62296915971.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082696c5ca20---visesi.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/ff6a9b9c95432689652a36055af6b141/10020349078.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/9s2gbq7tv21fbpofrsudlhd2m1/daputopizetomidabil.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a540bdb4fec---13683312030.pdf
    • http://texasstatealphaxialumnae.com/clients/f/fe/fe72632f573fdc77cca6b85875c63e8a/File/widunorevoxulewawize.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=banking+products+and+services+in+india+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_off0000f2e7.bin
79fb70dc99530ea4481a2f9af17a7cad33e78803983298b6607e949bd5beaaa4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E7 11060 bytes
font_01_sfnt_off00010cab.bin
82922b7252317f587112ee07afcf3802ed5059dcd20ce1c7dff678880affbfcd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAB 17608 bytes
font_02_sfnt_off00013b18.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B18 16792 bytes