Malicious PDF — malware analysis report

Static analysis result for SHA-256 9789ffba33c037ff…

MALICIOUS

PDF

68.5 KB Created: 2021-06-18 01:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b5d4bee898478b870d084f12f3902db4 SHA-1: a85ee30990fba5527d07b8045ea55ad9653d5d2d SHA-256: 9789ffba33c037ff465456d8e8142d19425a1f970c77af2314d69d319f0f1b7d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute malicious content. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, which is not typical for legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

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://feniks9.ru/ckfinder/userfiles/files/75399724013.pdf In PDF document text
    • https://htddienstverlening.nl/userfiles/file/batikodamodaruvewubefam.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a0a01a535---8815457707.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/5d2cf89cfcc6eb66a04561777a430b39/xudagoguleju.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/80cee111881574070e40e5b43569b190/pagofisukon.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/fuvipamekibaluwib.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095fcb568514---91376316369.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2443577141---47025702690.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/jafukubafisovoza.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767aec2a045---lagixarovenoruti.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/25284bde779e49b955590e81686e1f1d/15015073307.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2ffaa7d56---53488690845.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/11513037030.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/82164827665.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/sizisazerubonekumedutupi.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/gudosur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=watch+petals+on+the+wind+free+onlinePDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AB 5348 bytes
SHA-256: 82bc9f309748739c4ab809e6430cfdcf1719bb526caa63f3b81d19a333240298

Open this report in the interactive analyzer, or submit your own file for analysis.