Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba00c8591b07836d…

MALICIOUS

PDF

91.3 KB Created: 2021-09-06 19:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4cde3c6a57f17cc2e5fed0a62e9f09fe SHA-1: 1c2ce57ab897fb9a65d19bef6c10150b27a8981f SHA-256: ba00c8591b07836db820556a54ef6d1089451014cedb5a8741026742812eeefd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it's likely a phishing or malware distribution lure. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm designed for SEO manipulation or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://crewmak.ru/uplcv?utm_term=burda+magazine+download+pdf+free+2015 PDF link annotation
    • http://emotionpicturesfestival.gr/userfiles/file/45272766120.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/q511aegjc8vpgv3qfsnt2duhud/45247754667.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad67c24f3d0---36882972590.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160862712426e9---46748895192.pdfIn PDF document text
    • http://ktcyy.com/ckfinder/userfiles/files/vezokunegufezazet.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/271ae6bd8bf26e7468c2d4104e68a603/bitefedagixifafezilebon.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160734b155ad2e---vadexikajonuwadarizanep.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/98023238469.pdfIn PDF document text
    • http://gearcon-eng.com/file_media/file_image/file/kibizigewikibu.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/se1mn5vtn0dv7enhi10lo9n8od/jagojikazixapinovexokuwad.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/gapoduzigedugibeseribaw.pdfIn PDF document text
    • http://handgun.ee/media/file/fuxixim.pdfIn PDF document text
    • http://tele-video.ru/upload/files/wokifusobafutoripove.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/ude11ka9o2dno0ajik60j3p63k/45387886568.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/r0hkhjc720ph7sjvj85sgren85/fipifasofovuruxalomol.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/72179574471.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/nuserifuwukabatageripega.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/60b015q66pvabg2vmg0shs2fe9vnatm6/56838441057.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/94641400254.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/17787019283.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/nuwubaginodemare.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d69441ad55d---68770870858.pdfIn PDF document text
    • http://atmaircenter.com/lb/userfiles/files/99381143828.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210718050800.pdfIn PDF document text
    • http://kaies.net/upfiles/210716152845714123flnug0.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_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 19072 bytes
SHA-256: 4ee7c208ec1451489bf208e35d42961d00a1988151868857f6744b949d29a02c
font_01_sfnt_off00012cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC9 11304 bytes
SHA-256: abbcb230ce8b2c8b9f73ffcc80cc0bb7b36fc581e964302755c9129f01c53226
font_02_sfnt_off00014746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14746 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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