Malicious PDF — malware analysis report

Static analysis result for SHA-256 566ab948dfeab48c…

MALICIOUS

PDF

89.2 KB Created: 2021-06-28 16:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86c6c5bb8cf13089ec0bdf3cfc786054 SHA-1: 507181c84012a44fc521f3e4c12804d9d99f1e63 SHA-256: 566ab948dfeab48cbc62ab594be3276b529704d1a8cba6d1c441b4e59015a0b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. While no scripts were directly extracted, the nature of the links and the PDF structure indicate an attempt to exploit users through deceptive redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/c2137ae768084452f4eceb76defb08ff/78690302943.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/f3e2590dad3a3fbb699d4ed6710e6039/88384957561.pdf
    • https://kanalprofi.at/UserFiles/file/goxelokokobuki.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f383329e8f---82036539002.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/96e3a8ba340469974b2d96f278baaaf6/rojelukavano.pdf
    • http://poorclarescork.ie/images/9504080651.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf49dd3b4d---jebugotoxifusoteza.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ca4d4f74413---94737039573.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ae478f63d---25870311956.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/fikuton.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/88bf2aefb9ad1a125b596be4deeb21b0/22510215301.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b32c7415401be0eef576710ecd1b906a/sezizemivaj.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758f8b205d4---leluxivi.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16081506353e7b---82750231822.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/cpe0sl0gj7k9jg48v1pc9t7tv1/95644853908.pdf
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/it3uvmmfc2odenh5qqnq0kr8i1/woratuzufebekazidotelora.pdf
    • http://mamnonkitty.com/webroot/img/posts/files/xizivawaravaji.pdf
    • http://asja-doll.ru/userfiles/file/54211185698.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/566abcab6d503fe51b5898f90a507e7f/vonofed.pdf
    • https://global-brand.net/userfiles/files/43652976753.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/c4f0e7f6e4ef52e0fbaca125b75ea60a/tewowi.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/9li9mgur2ochtqj0gkc5begsc2/gikazunadobuxodavoxinino.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/97b93f7e030716fb713181462da7cf98/bosikofedoxigafowowunaj.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c2ade2767---66717458004.pdf
    • http://czdashan.cn/uploadfile/file/2021050222041173499.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+make+sheep+rainbow+in+minecraft
    • 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_off0000f4eb.bin
97d1de75c5e370650e6f374405b1a92206be7ee44ac19c08278d8b8418ff1052		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EB 18604 bytes
font_01_sfnt_off000125f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125F8 16792 bytes
font_02_sfnt_off00013e0f.bin
975e7775ae09883cd8109267421fa8af3cfd381d81374d24522efd9035fcb450		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E0F 11008 bytes

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