Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3e446b096d152c…

MALICIOUS

PDF

70.3 KB Created: 2021-10-12 08:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 77685cdf6bf1045bfafe257f1efd3480 SHA-1: f4e4a17b96edc4802678c20da083125dc78e45fa SHA-256: 2e3e446b096d152c6e0792825c78ba890ebac95256f9ec8c6bbf8598134536fe
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers as malicious. It contains numerous embedded URLs, many pointing to potentially disposable domains, and one heuristic specifically identifies it as a link farm on disposable hosting. While no scripts were extracted, the presence of many external links suggests a redirection or phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://indian-sped.szabgab.hu/fck_uploads/pdf/39429956828.pdf In PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/4af822ef25e82c37c209229f6c352f7b/66478015273.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/33668245800.pdfIn PDF document text
    • https://inarsindbari.org/uploads/puzitonomu.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/bamavaboresopiwuguziniso.pdfIn PDF document text
    • http://lonsdale.ee/tipikas/uploads/sisupildid/busujepuferiz.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/gagamanadixip.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/89460522742.pdfIn PDF document text
    • http://taaltoetsvo.nl/userfiles/file/jiwir.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/mofezozuwaka.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210902200413.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/10253230346.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/18982243191.pdfIn PDF document text
    • https://ulsantour.com/FileData/ckfinder/files/20211004_FDBF4DE9793B0199.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/safefokovuxoj.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/jalovafilovodimexinowupit.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/59976830146.pdfIn PDF document text
    • http://hmed.vn/upload/files/19853304529.pdfIn PDF document text
    • http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/22378704115.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/54711537273.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/54049936847.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/wenokimipozexa.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/54093711109.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/rupubiluvufokux.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/96318286949.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/1hHberoKktI/uplcv?utm_term=bread+cubes+croutonsPDF 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_off0000b265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB265 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA77 16508 bytes
SHA-256: 0e6a2ddfd85c9f9c5529553f67fbe1c1825d4345d91bfa7cf54787fc8b0d4e5f
font_02_sfnt_off0000f3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FB 10520 bytes
SHA-256: 46686af5095e06a9217a1eed609396f9c2fa10dfd5d710ab073e478dcb74e6ad

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