Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b47e913a44c1144…

MALICIOUS

PDF

94.0 KB Created: 2021-08-05 11:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9f0387c36b5de3397e580ac89acd6488 SHA-1: d3e1a48c68cf0cce05707b1472ff595847dcd99c SHA-256: 1b47e913a44c11448af6ce820baf59b2f560b270fc52c97c6c211b1ee8d038d4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0c4f14169---36216538723.pdf In PDF document text
    • https://anmoul.com/userfiles/file/74634461640.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a600a49ff53---porafipiduzetolulunisim.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ca3ddab4f---tegejodubes.pdfIn PDF document text
    • http://matras-devison.com/upload/file/kukawebukos.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe3f4631d4---dimijiv.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/zikugupukif.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/17293915212.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a03391596c5---65182037838.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/f738nel8krrmse7nnkpai591hd/basufexifitufarikukozel.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210525162192933955.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb41163d139---borugedutatobumenoxuw.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef787ef311---43804833646.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/67b9d21a5c25ad9d3471bb9664dfbc2c/22947442021.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/niros.pdfIn PDF document text
    • https://lasanisports.com/files/sowipotoxilajodivixinowes.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/tokegizuxonuviju.pdfIn PDF document text
    • http://fcvperu.org/data/fcvperu/userfiles/file/19785254837.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/c3144b150e1f034670791e08679e9ebb/desijodaxejepisagaxobuwe.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/pf7lqom0uug7uch26pnb6os0ki/geremolipiditivepob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=livros+em+ingles+para+iniciantes+pdf+downloadPDF link annotation
    • 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_off000106d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE5 19200 bytes
SHA-256: bbea7d134d9db7d2a744bdc6d21024292e3660a08505dba6e0bef5c8208592cc
font_02_sfnt_off00014e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E3D 11072 bytes
SHA-256: 9ebaaf81fa4798b2124bd0ab4cc5ada1674d4a7d7d05629415ae42a2668863b4