Malicious PDF — malware analysis report

Static analysis result for SHA-256 93306f8165840a5a…

MALICIOUS

PDF

74.8 KB Created: 2021-09-10 02:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0f01e43f3e79b7331c6239d29e7be9c2 SHA-1: bdb927d6abb5e52721355e8ede8b827904154597 SHA-256: 93306f8165840a5a8348b51ad8fdbcc60055813d53327b51cc2a9966ba14c2ee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by multiple engines, including ClamAV and an ML classifier. It contains numerous external URLs, with one specifically identified as an external URI pointing to a suspicious domain. The PDF structure and the presence of embedded links suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://philabc.ru/uplcv?utm_term=live+football+show+apk PDF link annotation
    • http://maschimaurizio.it/userfiles/files/30955611936.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/66442255143.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/32646003208.pdfIn PDF document text
    • http://orzo.cz/uploaded/files/18241398920.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/35721500221.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/pesuvukozowepigalos.pdfIn PDF document text
    • https://madhubanindiancuisine.com/nbloom/fckuploads/file/pumudo.pdfIn PDF document text
    • http://inggeo.eu/userfiles/files/1837575658.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/vibikojegazowenubegipoku.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/8670784439.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/deparesotowapixiperopav.pdfIn PDF document text
    • http://expertworker.paraleumarian.ro/app/webroot/files/userfiles/files/27838274549.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/kelasorodubasizowilekim.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/1374983682.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog/file/38452042122.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210903_201011.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/sifugavuxenekedoditona.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/lekume.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/58818204136.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/xuguvijorepogakox.pdfIn PDF document text
    • https://esvigo.com/upload/files/wulex.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/63918671389.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/rijovalikojexirefevigase.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/dewipixozisebizezam.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359787aebf0---8334770199.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/96175160961.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_off0000c05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05E 10592 bytes
SHA-256: ef91d532b314d039f2749e8a38d96e4c8b75878552d568bbcf00113b87d57a9a
font_01_sfnt_off0000d887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD887 17596 bytes
SHA-256: 4309f509e746121e1d7d73f115f8d1851809de98266c38851d351b4b2f0b31d9
font_02_sfnt_off0001057d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1