Malicious PDF — malware analysis report

Static analysis result for SHA-256 92512178e038282e…

MALICIOUS

PDF

71.5 KB Created: 2021-09-28 05:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d5de4e8e6bd68024054e02c1dcbc64d SHA-1: 8ee87702af07985f62db7f3aa107f2af800f3c51 SHA-256: 92512178e038282ed03b173caa485283f515edd8a059afe6c4883f070d15a0e7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are on disposable hosting and utilize UTM parameters, indicating a link farm designed to redirect users. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and the link farm behavior strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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=jajantaram+mamantaram+full+movie+online
    • https://ashleymongolia.mn/uploads/files/68908652057.pdf
    • http://saint-party.com/media/file/voxof.pdf
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/42448814281.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c1eb526d9---43564500220.pdf
    • http://krishikhabar.net/assets/ckfinder/core/connector/php/uploads/files/72934154641.pdf
    • http://champaigncursillo.com/userfiles/file/lidokuxonaruv.pdf
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/9148244909.pdf
    • http://etalentlink.com/uploadfile/file///2021090517021634.pdf
    • http://ibconsulting.it/userfiles/files/31304547679.pdf
    • http://ghefoot.com/fckeditor_userfiles/file/joxozekilakikekorevik.pdf
    • http://xzass.org/ckfinder/userfiles/files/88148647601.pdf
    • http://aptekadc.pl/userfiles/userfile/21499892318.pdf
    • http://tsraccountants.nl/mailing/images/photo/file/71594224710.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/f164b6dbe7e8950d2d7a9be333bcb9a7/vabesurub.pdf
    • http://studiovalecchi.it/userfiles/files/67035900065.pdf
    • https://bdprescription.com/ci/userfiles/files/70309606961.pdf
    • http://vervesimuhub.com/userfiles/file/pivewimotodoselabakuromub.pdf
    • http://basaritarim.net/admin/editor_resim/file/3483808905.pdf
    • http://seoulmenu.com/uploads/files/zipuboratematuvafujof.pdf
    • http://maihome.hu/admin1/file/79821402999.pdf
    • http://fotosvatba.net/userfiles/file/gisuwukawef.pdf
    • https://anjingliar2.com/contents/files/zozaxuw.pdf
    • http://mail-ex.net/userfiles/file/bujefiviwakub.pdf
    • http://bandenplaats.nl/cmsimages/file/sotisezuti.pdf
    • https://greenbins.ca/ckfinder/userfiles/files/41620436452.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_off0000b472.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB472 16792 bytes
font_01_sfnt_off0000cc84.bin
d0ad96600cbcf6cc7d09d888b293809a5878b618758cb089fa9938127d5e0fab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC84 17060 bytes
font_02_sfnt_off0000f81b.bin
ef73992b403d9373be0921179ca40703ded18a18191d306da4493d16b822f6cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81B 10496 bytes

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