Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d90d65c8be21be…

MALICIOUS

PDF

74.3 KB Created: 2021-07-02 22:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f4b0d630b3d49b7524a9294c2cc078a1 SHA-1: 82cbdd4ceb0fef845f5b04afafdf61dcdd8004eb SHA-256: 59d90d65c8be21be5d65bc117515753207a9d908f5cf316573477b821ffae870
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting. ClamAV detected this file as 'Pdf.Phishing.Trojan', and an ML classifier also flagged it as malicious. The primary function appears to be redirecting users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5451

Heuristics 5

  • 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
  • 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://widepolymers.com/userfiles/file/81503832078.pdf In PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/76203953d69043d88cecd6ca32dc65eb/nimikobamigal.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/9f81cdf2d900025c6d427b7e934e948d/vibumatopo.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160c198889c96d---95205715875.pdfIn PDF document text
    • http://chamdure.com/DATA/files/19090727113.pdfIn PDF document text
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/vuwilanasa.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d927bb88a7d---zowum.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/69237106917.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/xuwagibixarerufi.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/84855566915.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/139125664760ac37bd07556.pdfIn PDF document text
    • http://safetypath.net/cms_images/nojefetorizil.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/bb71bc8429e70e3e896d6b61cd5a7899/lorajedaworutokemos.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/komig.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/40213553984.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf398de1d0---dekarivomiwexege.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/13010639420.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c87c72d8810---80714560811.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16084fe2fb1a37---gozesanagadu.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/tuzunipijovibotim.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/detogatovexofamev.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/kavakenoradadogejeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=24+hour+tirePDF link annotation
    • 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_off0000d2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A6 16808 bytes
SHA-256: 867ae078b072f5bd2863b8ef24deedabb0ba67eff03d8a3fc0f3edcd8237e754
font_01_sfnt_off0000fd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001155a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155A 9924 bytes
SHA-256: a1d7726aeb9025d812894629386c35eb6874621ff061e0dbb93954c6aaf808b8

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