Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0203cd58672b893…

MALICIOUS

PDF

84.4 KB Created: 2021-08-10 11:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14083a4f99561e0d480b4df03ad50fbf SHA-1: 7c3f5bf67584e7c2ecf0926e0a67be36bc130e14 SHA-256: e0203cd58672b893f8ead3415b14b7b27ca9efeb7d12d3c44687d6fde37a5714
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a phishing or scam attempt, likely related to document conversion lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=how+to+change+a+pdf+to+word+doc+on+mac
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/d206a6dec335e7a6e1aa262f0f591fb9/sojikogakafefoju.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160988a022030e---37840047663.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f627f6c8e59---xalaxiwosonerob.pdf
    • http://twtipa.com/upfile/files/2021/07/22/bonetuwinizuvenenatob.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/24534b62e7d32b7ca2493dabd57c6ffe/balos.pdf
    • https://concertwristband.com/resimler/files/vinusijenifojadijaki.pdf
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/87555186431.pdf
    • https://questyme.com/userfiles/file/wuwutazawifuxife.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a4b8f03c6---84616628583.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/6ereduk9ur0hit79ltbr6ffga8/41824004237.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c893eec6bdb---wugotorapodagiriwokakonu.pdf
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/90476240175.pdf
    • https://kp-bs.ru/upload/files/15300711619.pdf
    • http://debeleven.net/UserFiles/File/47971073693.pdf
    • https://palcev.ru/userfiles/file/keruwetitizo.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/66c633475df9a0d617b4f695e9ec650a/69365228982.pdf
    • https://nepalmicrofinancesummit.org/userfiles/files/72564120594.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/792514504cae489fe3e0c69ec49a0a70/joxonipukurazuvemarawa.pdf
    • http://stroisvias.ru/userfiles/file/mavatimutufevuloxofex.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/90f98ecb9a6d3b40b68466d18a0ed5d0/pamasexarerejopeva.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160824ddb63a2c---kujimetifuvivu.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/a0fc265d3f6797229c53556d9f1a2859/9106318623.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/xonirudipomasanip.pdf
    • https://baxsporthorses.com/userfiles/file/sopojojexebimejibumo.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_off0000e5e1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E1 16792 bytes
font_01_sfnt_off0000fdf3.bin
ce6ed790062edc528754bcdb5734180b626270cdf2a618df8760d647df554882
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF3 16948 bytes
font_02_sfnt_off00012a68.bin
93d311e78da6ccfed86b65d1eeb1371234158c556e615928b953d2207fd6f8e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A68 10836 bytes