Malicious PDF — malware analysis report

Static analysis result for SHA-256 6035f672674f6638…

MALICIOUS

PDF

81.8 KB Created: 2021-08-11 21:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fdd22bce9467a75e1b571cad89178fba SHA-1: fc9942570632100c0530fc6d12da3cef0dd436f0 SHA-256: 6035f672674f6638f56ff642074bde737773e18546c6b85b65b929c9b6f11e49
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a tactic to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6314

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://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35145197164.pdf In PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e3399aecf---99275733050.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/94132983864.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076197937f12---33700398445.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/2mnvfchrvka8ddep10ls8jcmgq/91036492897.pdfIn PDF document text
    • http://obraz-tlt.ru/userfiles/file/57266934939.pdfIn PDF document text
    • http://sartor.ru/upload/files/35039769411.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160f63821cc68f---lalewisanuremewozigobido.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/vexoxaj.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/dedova.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/94147174594.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/70479456174.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-1/20210501023241980086.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/tnvgktiqf5takhqgjr6n8et8ug/popoxotatitiwuzajivev.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/7226430200.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/8933962220.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607328267f3dd---xutoj.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/bamewozuvowasowilolu.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f83360ef65c---debegolaxuvapedekuta.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/donuxa.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fece9ef12---dezoz.pdfIn PDF document text
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/jutoromowadurog.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/12801594746.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607592b474f33---50751811663.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=auto+lotto+processor+free+downloadPDF 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_off0000f8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CF 17364 bytes
SHA-256: dcdafb19351bcd53efc8f18e542592bd189e82d597db4d9ad383fd040377906c
font_01_sfnt_off00012634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12634 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1