Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f982dc1394231c…

MALICIOUS

PDF

86.5 KB Created: 2021-06-28 02:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ec88ef34dda41bcc02c01997204a19c3 SHA-1: ba501ffbfaa7f43273289a85d1142ed5ac7b1b88 SHA-256: 94f982dc1394231c5e6a2198952328507383a09f178fc1ace6e5c8647b628b95
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are new or changed payment instructions, a common tactic in business email compromise scams. The numerous embedded URLs, many pointing to compromised WordPress uploads, suggest a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://archism.ru/uplcv?utm_term=for+making+me+believe+that+you+could+be+faithful PDF link annotation
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d34d7e42b---xujutavapajam.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/sozozeb.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/lapalatedewubuwaxivufaj.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/8c9581bee51dfb9ccccc52444c04bdce/61674920646.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/tipujibemotegemekegowaked.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/kuxufesiketoloxesineted.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/ritisaxevusavabowotexivi.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/39298992334.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/34602982892.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/3e2c19b54c264fe8bacac22a5ecd39d6/vozikilapovofipuliz.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/q2iup80nvvdb2jjq8rji0g3hi4/32870551457.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/dupipejabopesifanamubama.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/4c7056bdbc7ffb9aac2763c256b5ee39/59232748555.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/qp9siturcb2799ijp62esm6sss/nalazeb.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/f3o6tkjnf3ov9824ipmgp7lhf2/20808752516.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/qt3c7or8b7f3vsfeqrg6m4g1t1/1019832969.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/vefobabijegegufefi.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/gorifulononitujavo.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/u09revp13cca0839cscmvntiv5/kaguvadesarure.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/052949a1a48ac48f735f2f7d0b0608a4/81030063290.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/liretidafewilijinujujijof.pdfIn PDF document text
    • https://bluetact.com/ckfinder/userfiles/files/roxamijekofofolazok.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608077cf59270---sanotazezebapukafirewub.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF14 16696 bytes
SHA-256: d7cb9b39398f549426247aa0633a865a7e4a0c599dce48043a113c24c19bb5dc
font_01_sfnt_off00011a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13293 11244 bytes
SHA-256: 107fa378a9468d6c9db55b46005fcdb53feaa69276562dd73d75c7c1c9ff6c5e

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