Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60e34fdcd8db29d…

MALICIOUS

PDF

78.7 KB Created: 2021-09-18 08:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7b43899d2d69ec7651379d1545f2bfdd SHA-1: 021a3f305846e9f3282be71104e47707e3eb4f2b SHA-256: a60e34fdcd8db29dbce2b5d8189238ea4eae43a6220fa49962ccda0086708337
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm, suggesting it's designed to redirect users to potentially harmful websites. Although no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a malicious intent to lead users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://ketchas.ru/uplcv?utm_term=snaptube+video+converter PDF link annotation
    • http://wxmx.cn/upload/ckimg/files/202109161724373996.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd0bb53690---14039219908.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/rezogomumemarumozax.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/10eaa68afa19663224a893ba938982a7/1366240303.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/zapomewasetu.pdfIn PDF document text
    • http://neteyes.eu/editor_up/gijosoraja.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/82632988317.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202109101338054137.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/donituvilatakasenepoza.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/zudebikitavozolonukusix.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/xixavifesebatubivikofana.pdfIn PDF document text
    • http://mastervin.ru/files/file/9693922280.pdfIn PDF document text
    • https://gazeta-msp.pl/user_files/File/98461706753.pdfIn PDF document text
    • https://hk-delight.com/UploadFiles/file/xamujanesusebubidezora.pdfIn PDF document text
    • https://superpart.com/files/47407751520.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/25011098221.pdfIn PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/muniwavavikubozuletasul.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/47696900822.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/natedanoma.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/15946600961.pdfIn PDF document text
    • http://gtshotel.it/images/file/malogidasonel.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/82675484656.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/10775534823.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_off0000cdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EA 10676 bytes
SHA-256: 5b8e21af276abaf4ed34aeba717196f246180e6d3cd90d3619b468b871869a7a
font_02_sfnt_off0000fe4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4C 18336 bytes
SHA-256: dfcb392f65a6d6284b27a1928964a497178f51bb0af2fc67128136bf8aa2473a

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