Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd9490b943cf990…

MALICIOUS

PDF

71.2 KB Created: 2021-06-21 03:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da268fa827161f3339a4030fa15a833f SHA-1: bc3e4d879f4167c2d7a7e32c7b216c38f5c82936 SHA-256: edd9490b943cf9901841214d5a8914a980e5452d769cce9cea5926d2d85a43f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://tovicetour.com/FileData/ckfinder/files/20210606_D2AA234568882296.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/a06978843f5454b09095cc92d3e51edb/kolazej.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/u7q8973jp1pmidrsvregjji7f4/57322715570.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/1ctb51rknktrgti5lkj4critu0/81028751854.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/8t2lhad85t9srkbj3lpgd9hfs8/92344147716.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/984c04aef75dcb4f6261ae2d70b44946/7486772630.pdf
    • http://abpaluso.com/upload/file/53869454647.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/6qbkd9juk20f3qkud6dpl01vst/gasukisuwofin.pdf
    • http://17njl.com/userfiles/files/bajuzikufofuguwuro.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/3554af4d238c24afce0208c57acbbd01/jutixotuzutovopejewuzigak.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f763e6c2f---30702685398.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16086bdf60c862---ropogafoxi.pdf
    • https://alzubidi.com/userfiles/files/nugif.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b14b2a093---vederuvixipawu.pdf
    • http://usateatop.com/_upload/files/lusugunu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=english+notes+2nd+puc
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8d7.bin
39cf89a8702ac45080644bd2ad9e2e3cd2b90b7b8f6946726bab6346bcfabffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D7 5120 bytes
font_01_sfnt_off0000ea4e.bin
58f35fd1a9407672c335a683bf74f29de5ca32620c7e3bf584bf177097fac18a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4E 10812 bytes

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