Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa164c201e3eb0f7…

MALICIOUS

PDF

85.3 KB Created: 2021-06-27 21:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01e670dd8ff759665d01334eaa59707e SHA-1: 5abfcf37a4a4a9aa45a9daa72751a6312151e34c SHA-256: fa164c201e3eb0f71feb6cfd95689746ffff66e8448da118f138862b5b4d5069
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

This PDF document was flagged by ClamAV as malicious and by an ML classifier. It contains a 'Clipboard command execution lure' heuristic, indicating it instructs the user to copy and paste content into a shell, likely to execute a secondary payload. Several URLs pointing to compromised WordPress sites and disposable hosting were extracted, suggesting a link farm distribution method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebcbc3111b---fukirazonasebames.pdf
    • http://cobansut.com/userfiles/file/wosifid.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b9be65602---27819884321.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0df22732a2ce0332800207ff9c7a56bf/xunisawazilejo.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b63aa926c4d---mevuxi.pdf
    • http://ahlhy.com/uploads/file/040355417155.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/4em5f9oljnikrsanvvhcbeielm/japirozepifopopogu.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/ed877f4761abc94c1d6064f7a4828b42/36864690023.pdf
    • http://adaviestransportltd.com/userfiles/file/zajekedegoz.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086192f4c1ee---72375951648.pdf
    • http://www.colormotion.cz/UserFiles/file/25907122577.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/741e7779cd847fcb5f890230094fe9e1/fuzepumapolu.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/2f1e5f7aa7d7b9b5be1af178a3a11f73/69132747812.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608b093b6fa13---wijikas.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b7532572b---18911114301.pdf
    • http://skolicka.eu/foto/images/file/gosogegewuxewex.pdf
    • https://landbondcorten.com/attachment/file/59cb938fb40c2c31f9e7483b6a6f2fa2.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/ng6c5cll5h016re9iqpn5j1fm1/robabudejujotulareme.pdf
    • http://bmcnx.com/userfiles/file/44696273276.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/v3hcahfai88elpqj3i796rs2lb/zonur.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6486ee9a5---zovaximapijufubukesuv.pdf
    • http://poltinik.ru/userfiles/file/wafalirunotibisamizovijan.pdf
    • http://www.kilincsweb.hu/fileok/file/40561667670.pdf
    • http://tgtech-auto.com/userfiles/file/1390464269.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c1ada1aa7---55760515369.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=multiple+image+to+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_off0000e849.bin
48cbe46d4bb3cf92155a04e142d2d728704a171f765884cb7a7e8b68cac49511
pdf-font-stream PDF embedded font (sfnt) at offset 0xE849 17936 bytes
font_01_sfnt_off000117e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x117E8 16792 bytes
font_02_sfnt_off00012fff.bin
4f64e369b6aaf0d247ca0850e8176d75935673075e85035149233b66708684e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFF 10560 bytes