Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e594c0484ed036…

MALICIOUS

PDF

81.4 KB Created: 2021-10-04 23:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 4b98bba1c7292f5283b21a6a295f9b84 SHA-1: d87f79d9ef3addea22a3610387fc4d3a7f51ace3 SHA-256: b7e594c0484ed036defde9edf33ba632e94a916b96153e515f4069d8c6b2018c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs and is identified as a link farm hosted on disposable domains, indicating a strong intent to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting a tactic to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://nomylo.ru/uplcv?utm_term=chinese+broccoli+mushroom+oyster+sauce PDF link annotation
    • http://ingpoggi.eu/userfiles/files/13903990394.pdfIn PDF document text
    • http://montereypark.kopanramen.com/uploads/files/59941624239.pdfIn PDF document text
    • http://adice-area.com/pictures/files/gaduvebuvenak.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/47470170955.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614dd952bb75d---buronorigekapuvumowasavuj.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/fiwopalobevemevezez.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/piwuvawawilesasuxevunawij.pdfIn PDF document text
    • http://nkmate.com/FileData/ckfinder/files/20210914_EE48C68E0BCF048B.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/lasit.pdfIn PDF document text
    • http://air-con.ru/upload/files/tobefad.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/44982634798.pdfIn PDF document text
    • http://186086.com/upload/files/xitetegadojaxiwov.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/tikujeron.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/47338549639.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/lafijupenobitaka.pdfIn PDF document text
    • http://www.gitialiganjlko.org/ckfinder/userfiles/files/dexoretajebexulunopaboge.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16158a5856d5ad---wuronimotiduvegarifipulu.pdfIn PDF document text
    • https://rtaadmin.mrv-educationservices.com/content_file/files/dotekizomagaxepuvo.pdfIn PDF document text
    • https://comfort8889.com/upload/files/bususakineda.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/83015291940.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16319820630318.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/piduzovupirewitowovap.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_off0000d8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DF 17868 bytes
SHA-256: 54657ea4e617ab853ea146878cf1ed720f1546e17c2b04978dd9a4b38d623f62
font_02_sfnt_off00011f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F27 10880 bytes
SHA-256: b533def6b937636613e5993f5ffb7f31278c2b47349404dbd80733ce6adf86d5

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