Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3216d45f8a55eba…

MALICIOUS

PDF

84.3 KB Created: 2021-07-19 05:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 66f7b1a6dee8bc67516e35bd818d58e9 SHA-1: 46df301e9c2c960d95c96f00023d6f3120b8fa8e SHA-256: f3216d45f8a55eba839f0b22332c69dc24bf5182cde5c86ae49c38dfdb1fc914
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple heuristics indicating it is a link farm hosted on compromised or disposable domains, designed to redirect users to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' and 'SE_REMOTE_SUPPORT_LURE' heuristics strongly suggest a phishing or malware delivery attempt, where the user is instructed to open a password-protected archive or engage with a remote support tool. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://aartipalette.com/userfiles/file/67380048307.pdf In PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/9ecf7ff7ad53abf65d68c619a8cb88f6/90024758301.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8ffd9a3ad---sugowipiwodilasaruzoj.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/79f66d1d1db6ab1b3ad4e70ae83d6926/78544201998.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091fb847d7df---30166737350.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/78964924239.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cc7ec5102---pitexukokode.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/favejokuj.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/53291249698.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/76123244429.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c54879f3d---59155892023.pdfIn PDF document text
    • https://info-jimukyoku.jp/lot/upload/files/10701212533.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/7amvl62b2snbdirv9s7en6d203/dobufota.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d6515b1066a---zazijurogajosofilovozogi.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d85c30881---33760304610.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/vhcq3sks0gsfdaondmm0nrl0b9/wixivin.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/nmn765nu0farc266b6t3h9huf7/59182988251.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/58453836021.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/belodikeb.pdfIn PDF document text
    • https://htchninc.com/d/files/80923601433.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/rabepatojodekemowajikani.pdfIn PDF document text
    • http://www.alborada.es/ckfinder/userfiles/files/zusikabexo.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160824609b19c3---mufumizokatebox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=forgot+yahoo+emailPDF link annotation
    • 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_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 10376 bytes
SHA-256: fff584e362d55e4d6627355af1d7cb6b28e4d20f6c8c470d9b8ae8b8c1e8fa2f
font_01_sfnt_off00010082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10082 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11894 16740 bytes
SHA-256: bdf3450be23565bdc07221e58b5e41017aa227a0460136f3e915f9c25720cadf

Open this report in the interactive analyzer, or submit your own file for analysis.