Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ccdb0be8e312da…

MALICIOUS

PDF

84.7 KB Created: 2021-09-01 10:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d60a221b17e8f305bb1aebfca8a9b9bb SHA-1: b3167db7368758138c17fd2dd1a9020ca6293179 SHA-256: e3ccdb0be8e312da233bfd4633bb9d9c2ae15f1dd87af8c645020db01accf35f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a focus on external links for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://garglob.ru/uplcv?utm_term=cyproterone+acetate+and+ethinyl+estradiol+tablets PDF link annotation
    • https://bomberosdenavarra.com/userfiles_nexo/files/23009413659.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210714084214.pdfIn PDF document text
    • https://greffedecheveux.center/upload/ckfinder/files/zedulisewufa.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/14826c148387658e8af15d60a2555a68/9440976552.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/sinomopasiwilufuvani.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/20mivmrbiapqamhfrohmjd6pep/11235981553.pdfIn PDF document text
    • https://bibliothequeanglaise.org/upload/files/80866846393.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/27581976182.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/gedujeperolofilowewikut.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/worerabemojojudu.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/motoxobenukonukuwoju.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/vilugozituweket.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/42538628957.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/zimuw.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/b10f73695aee4ed205ae525a337699ac/98694394541.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6c8082573---memokisupetiz.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/sozixopagofolo.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7f5888551---55439236360.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0aa55e1106---93554361934.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1608d45fca3f1e---322178776.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/73964467022.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089078ed236c---welejaxipadumefajobesif.pdfIn PDF document text
    • https://mattress-leader.com/media/defajajifogub.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a56d6e58e73---sezas.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/e64eb870cbd1a67334d0486a15f79673/98241575276.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_off0000e205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE205 18800 bytes
SHA-256: 45d3fba81b2926b191b880af1bbbecb8c156d76cf8a7129c17cc0c5fc563902e
font_01_sfnt_off0001131b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B32 10896 bytes
SHA-256: 43a7b51bee14bfa7c2c90497702fa2a3cb44346b6f48b101d07e439585b8efbf

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