Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe6ff8c00cb8ab5…

MALICIOUS

PDF

59.8 KB Created: 2021-08-17 00:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0d7916016ee10dbe27a6fb6df6e09bc2 SHA-1: 31d61b9ea6e4a321598d36569685faea9bfcbd20 SHA-256: ffe6ff8c00cb8ab592b7179e4680c82fa04cc0f1e49002f7246d5ee217799904
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it's likely a phishing or malware distribution lure. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of multiple compromised CMS upload links further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8261

Heuristics 5

  • 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
  • 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://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5de33803a---suxevofegesakimoboj.pdf In PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f29378ed1---55321269025.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/mbmtfh1nhdmvgl9arp75q81o6d/nerabojupowuxuko.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a423dff3792---38337689934.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/a35b8a141d6cb1510467dce61a67d24e/22515681798.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/2261143142.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/69844683647.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/4c1693171f807db57990cc76d35188a2/88233959438.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/13896a0c5d8d1defd89a98cb001f02d6/ririsokatuv.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/dovifofumelag.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/75045547299.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/xakofonapinikesekazaganob.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/topijawamubobuzorewet.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107e57e23bd9---43716507970.pdfIn PDF document text
    • http://teaandtiarasmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/46446138776.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/jibusexopudulusupemabare.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082e56a14405---dinogadunukubutawofix.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/4d43b43fd4657bb86a39b0446704d3fc/roxemegolexavoberubosej.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/limijuri.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/67451121560.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/f4fe714fdd29f461a3635637620b0a37/72977494409.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=gjj+hoist+manual+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EA 10800 bytes
SHA-256: 86400f107dc8a1170430aeb5c6666d301ab87a80e5ab800015d6e8b2199ac83c
font_01_sfnt_off0000d297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD297 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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