Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30dd02475d21b4f…

MALICIOUS

PDF

72.5 KB Created: 2021-09-13 04:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5b6dbec2fe2faa0ed74284896e45ad86 SHA-1: d24be23fa3e565526a8fcb7c04c9fb6c57e8566d SHA-256: e30dd02475d21b4fc7e323ff91bbe0de8dbc928330ff05f2a0e7db3bb509aee8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=internet+download+manager+software
    • http://domuran.pl/files/file/vivelotirepub.pdf
    • http://abw10thstreetne.com/uploads/files/58858374112.pdf
    • https://topclassgreenery.nl/images/file/39889718960.pdf
    • http://arcomproltd.com/userfiles/file/jilozagadul.pdf
    • http://buyyoutubelikes.com/ci/userfiles/files/44871823561.pdf
    • https://fundoohairstyles.com/hairstyler/images/file/57809925494.pdf
    • http://residencelesaline.it/userfiles/files/48560897081.pdf
    • https://easy2ticket.com/upload/files/guvupozudimupodavi.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/e8fbe64c416c7a06b04023183160d109/gaweni.pdf
    • http://snp-ent.com/files/fckeditor/file/837068448612f03c238214.pdf
    • https://scavilecis.it/userfiles/file/15052688038.pdf
    • http://casaledellasignora.it/userfiles/files/28770206192.pdf
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/nogafan.pdf
    • http://prestinoequitacion.com/imagenes/upload/files/sodubevisukug.pdf
    • https://foursservices.com/nbloom/fckuploads/file/5106844998.pdf
    • http://pkpneu.cz/userfiles/file/9043184180.pdf
    • http://hoshitorionline.com/uploads/files/lufuratozodekakugubon.pdf
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/vozek.pdf
    • http://kozelsk-adm.ru/files/uploads/files/xudologejizawokozako.pdf
    • http://www.gesas.it/media/mailinglist/file/24495653283.pdf
    • http://riskhedgetech.com/uploaded/file/527124493612f611c77b0f.pdf
    • https://jimsdelibrookhaven.com/demo/jimsdeli/admin/userfilesfile/sagefisunozakupogupaw.pdf
    • https://rkdestate.com/userfiles/file/gamigekirisoputu.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134177c1c34e---detejiziwa.pdf
    • https://studiecarriere.it/uploads/file/luwunepunabafivojatemukul.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_off0000b9cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9CC 16792 bytes
font_01_sfnt_off0000d1e3.bin
1a4f8a4acb539f78f21a9462392b56b65a0eb38b535c153ad6c025f355f41de7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E3 10644 bytes
font_02_sfnt_off0000ea1c.bin
89025778c9fde2bec82eaa988f1f0ac14f67b9ffd7f1228166e9660a34cec7eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1C 16520 bytes

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