Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7325a91792445e…

MALICIOUS

PDF

81.5 KB Created: 2021-09-20 22:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d76213cdd71ba83511f34e12397fc9e4 SHA-1: 713788644af069e7cb336dad5164938232825783 SHA-256: 0b7325a91792445ed931352eb17b9875bd4fb29f5db45f939dbe64e16d34e757
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://garglob.ru/uplcv?utm_term=jurassic+world+the+game+hack+apk+2020
    • http://romanasulcikova.cz/userfiles/36066267893.pdf
    • http://advairtech.eu/assets/userfiles/file/duguziw.pdf
    • http://holidayinntorino.com/userfiles/files/37843199778.pdf
    • https://sealand-pptc.com/userfiles/file/89570064485.pdf
    • https://pinyardim.com/calisma2/files/uploads/15809215745.pdf
    • http://gpkoaee.ru/ckfinder/userfiles/files/40361408743.pdf
    • http://seanmore.com/userData/board/file/26534525261.pdf
    • http://adamlegal.com/userfiles/file/27541233417.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/21ce24f29c0a721d4b6096b21478a842/86786375827.pdf
    • https://fanaf.com/article_ressources/file/jomogapavas.pdf
    • https://myclubowners.com/userfiles/files/24555025062.pdf
    • https://songod.vn/uploads/image/files/43479734008.pdf
    • http://ji-tien.com/userfiles/file/27033147821.pdf
    • https://alharithiforcameras.com/ckfinder/userfiles/files/26241818588.pdf
    • http://dpholding.ru/uploads/files/visitekegitoj.pdf
    • http://energyexcess.com/userfiles/file/84051930677.pdf
    • http://c-amc.com/upload/files/84501060843.pdf
    • http://blccy.com/userfiles/files/xakiwotowabitudegigekezat.pdf
    • https://sklep-pinokio.pl/web/uploads/files/betirutuzuwipubako.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffbca51ff6---xikikixopafit.pdf
    • https://yumasri.com/assets/ckfinder/userfiles/files/vonakikud.pdf
    • https://fainitelecommunication.com/public/editorfiles/file/50002212929.pdf
    • http://youil.org/userData/board/file/rotazesix.pdf
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/temavobi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d11a.bin
958be0af549cb24abc5c287e69037c61daf1b619319ffa9943596a63d04aad45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD11A 20164 bytes
font_01_sfnt_off000105ad.bin
50cab06e644ecd67831a38569c89f404ac1085f20e9f4061277bdf04b1c81908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105AD 11368 bytes
font_02_sfnt_off0001205f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1205F 16792 bytes

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