Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d08c4926c90cc79…

MALICIOUS

PDF

68.8 KB Created: 2021-09-28 03:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f18b1a1c5c7d73af5840fd2848100a43 SHA-1: 4479ca8c7beda5aa3fedbe517163d7d893c1974d SHA-256: 2d08c4926c90cc798d98539e31b0689816cfbeb1ad2b1dce660e606459b6b9bb
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a likely phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 4

  • 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://queure.ru/uplcv?utm_term=venom+2+full+movie+free PDF link annotation
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/17936172035.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/sazarupovolalujekum.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210910101428.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/pinozowotudotevagopidi.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/4299590400.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/98781396689.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/mobosufejegolexitatixag.pdfIn PDF document text
    • http://sghr.ca/upload/ckfinder/files/bexojokamuti.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/43945733929.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/53548813076.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/46976886903.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/59065657491.pdfIn PDF document text
    • http://tangneylaw.com/admin/images/file/20000395148.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/taliwidudavatud.pdfIn PDF document text
    • https://2winit.com/Files/files/xitutogoxib.pdfIn PDF document text
    • http://keramann.ru/uploads/files/kuvezorirowiwalemadus.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/13385229445.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__613254D37D250.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/4171478401.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/52294772454.pdfIn PDF document text
    • http://js-space.de/userfiles/file/57237165286.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/semodoluvekibibi.pdfIn PDF document text
    • http://le383.com/uploads/files/wokegot.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/32246511114.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_off0000aef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF3 10204 bytes
SHA-256: 9a5f1feceeb8de18d36e2e923b5f85ca7b8c53939b3734804827d47c662fcfd8
font_01_sfnt_off0000c5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CA 15972 bytes
SHA-256: 3533aaf1293e41c10f2418f0d8bb753f19e1a4197473534e7f6797571df3ec22
font_02_sfnt_off0000edfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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