Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a914cd5ef4edaba…

MALICIOUS

PDF

74.0 KB Created: 2021-09-19 14:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 08e6f5b96eb1c4a00c3731d32622b274 SHA-1: c67bf8f2683155fd06bac5e6a72fc82b66e2d9be SHA-256: 6a914cd5ef4edabae20a4f693253be2decf59174121c7f90686c6627a0eec3dd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://hohsingfiber.com/ufiles/files/xufunezejokojoxida.pdf In PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/76797055323.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2bed26bf8---91298798297.pdfIn PDF document text
    • http://cx-gl.hu/images/files/fufudomuf.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/48810000222.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16138d0be447fc---41926283099.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/94868904131.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/61702057019.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/45050437581.pdfIn PDF document text
    • https://canoe.ro/Extras/ckfinder/userfiles/files/fimavebepod.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/57293127323.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///vemikuvalak.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/64852493454.pdfIn PDF document text
    • http://grimastone.ru/files/molubolivut.pdfIn PDF document text
    • http://canvangdientu.com/images/file/37441919121.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/ropadenexalimaresiwik.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/datis.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/vejibarelivozugidatosovo.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/66081625224.pdfIn PDF document text
    • http://ed-union05.ru/files/file/78134713590.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/45526666662.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/80510119458.pdfIn PDF document text
    • https://phukienbep.net/media/files/86356766054.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=best+ipad+racing+games+2020PDF 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_off0000bcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF2 17112 bytes
SHA-256: 94d4657dbeea195eb1fdabfbae5bcde7e91b116929758851bde9d8ba1dcf47b7
font_01_sfnt_off0000e8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BC 10984 bytes
SHA-256: 796343eb756905e6e0dd451e1679362c43119911263f94221d3a13b9f7e5041c
font_02_sfnt_off0001021c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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