Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ccbba0f3157446…

MALICIOUS

PDF

95.7 KB Created: 2021-07-02 11:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc6f90f4b5b02ac599ab96f21dcce98f SHA-1: 5c91e706fee41661a52d17ecadc56503976aa513 SHA-256: 07ccbba0f315744630ca2d5b7f915870054a633e701d724689c63393e1d90417
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://irlanc.ru/uplcv?utm_term=sticked+meaning+in+english
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/mafomisosuba.pdf
    • https://cplastik.com/data/cms/file/72192112637.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/95accdde85c49690df46c1bdc5b6b843/kokomubi.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087345ee2945---37812916580.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/ues1ggssgdh2n7uit07j6k2rsm/17742811064.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5565e77f26---50662109206.pdf
    • http://comp-art.ru/userfiles/file/77375247996.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/cd8d343db4dc0c59676def527559cbbd/74355680143.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa5909f64a---tegevapumogozovixegojowup.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096de73af736---manawozutoxatimopawofijul.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/8r265cqttt8fgojs11cgib5bob/78214711134.pdf
    • http://hani-bee.com/userfiles/files/galibovodorepotisepo.pdf
    • http://www.thaiboat.net/image/upload/File/72605554942.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/eor40hahht9nn78v079h0pf1tb/juvododazatumeb.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6e7d7206d---30445117794.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c44fb213d2d---tukuloxar.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/4bd6baf264c48dfbee842466ed62e522/5957532098.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/9c12f43a776f3f4e529498e42bd18123/nevenafef.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/e46f53359cb212f02df8e3a154006a6b/gotejejo.pdf
    • https://groupunsur1.com/contents//files/18943796292.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a56e05353b0---21128140973.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca2159b5c76---xuganusodiduxutul.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c2909c4eeb4---97438016644.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_off000111c9.bin
c66466faecb23a921c047c672123dfd37c1ef5a8cd9ec5d849605aa79b38687b
pdf-font-stream PDF embedded font (sfnt) at offset 0x111C9 18044 bytes
font_01_sfnt_off00014131.bin
ecd16d873fb06664aae8a47723f397bfa7e4d5633772f036634fcea6ae4a4315
pdf-font-stream PDF embedded font (sfnt) at offset 0x14131 10764 bytes
font_02_sfnt_off0001598a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1598A 16792 bytes