Malicious PDF — malware analysis report

Static analysis result for SHA-256 218b5197a268bfe2…

MALICIOUS

PDF

70.9 KB Created: 2021-10-07 08:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 094a5331422f97ae091becea253e4acb SHA-1: bef1d3dbc812f9f165d32885151b1527c2b20d0c SHA-256: 218b5197a268bfe22fce5e23509022bc4e23b368eb28410a8d558eff2a5d112d
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6632

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 https://drafthe.ru/uplcv?utm_term=how+to+make+an+elytra PDF link annotation
    • http://www.almansori-ye.com/almansorifiles/files/32711764581.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148759740e89---betedimadikil.pdfIn PDF document text
    • https://laser123.com/geektic/files/5893196243.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f22a8c495e---97812934416.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/80c2a78d8847a890dffde1106cfb010b/jumefif.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/viwunik.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/19106016337.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/60500535936.pdfIn PDF document text
    • http://nationalherbo.com/userfiles/file/xopurometezekoxekenuwobu.pdfIn PDF document text
    • http://alothongtin.com/upload/FCK/file/rukusuwefipu.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/51790308630.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/89486859534.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/544c39c9fdfe4011e1ba3634a457fb2b/raguzojazikenuvol.pdfIn PDF document text
    • http://dolaninsurancetx.com/customcms/uploads/files/10686878690.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/10409941800.pdfIn PDF document text
    • https://kemxoithanhhang.vn/app/webroot/files/images/pages/files/6010419227.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/57329931172.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210928153726.pdfIn PDF document text
    • https://textosolutionslinguistiques.com/upload/editor/file/14385259485.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141fbd96fd9f---panujumegizegin.pdfIn PDF document text
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/sovalibogegipo.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/futoredimolofutejubiv.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/nisosijoxubav.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/49066249779.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/92389843560.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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