Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d6749a17c2d653…

MALICIOUS

PDF

70.7 KB Created: 2021-09-08 18:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5028746eb9a5c5255f43bfbff6997244 SHA-1: 4d71d7e8576dd010b2801f66c988c2958deeb80e SHA-256: 32d6749a17c2d653fa29fe73dc986a3d00f6d0fdf8a573af218d8c49336f9dc1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=hague+convention+1899+and+1907+pdf PDF link annotation
    • http://arcstema.com/userfiles/files/10933146749.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/pifesadixofokijiror.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/8d90abf0ffb37a2988ea4aa2b77e739e/72021117464.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/zenimufazafosefofod.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/72945364725.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/vusobadazujowolewoge.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161377b623c891---pamojagebegoligawedebos.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/duzitogakake.pdfIn PDF document text
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/47917351992.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/30266051772.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/49353087302.pdfIn PDF document text
    • http://sententtech.com/file_media/file_image/file/64859709590.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210906200639.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/tijokejelivipikada.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/nivumunozavesod.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/62238754882.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/dipapa.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/5538899724.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/tatekup.pdfIn PDF document text
    • http://shahgrp.com/uploads/pixos.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/resijogagejelefuv.pdfIn PDF document text
    • https://hiroyoung.com/data/files/80193892027.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_off0000b3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DB 15280 bytes
SHA-256: f22262fb7b7213796b94690f2a1f09a0e62701915e177c1ee68e10a1268b2eae
font_01_sfnt_off0000da77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA77 11236 bytes
SHA-256: 6dcb147e9ae58da4c10ea65540aac4ca31320efc2280f833a8c2239aaf1c3360
font_02_sfnt_off0000f4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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