Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbdc77b59bd8028d…

MALICIOUS

PDF

63.8 KB Created: 2021-09-02 10:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3030cedf9cfa5c0442c915b11d8edc95 SHA-1: 7609e30767300c7414d07d50afaa37a5605062a0 SHA-256: fbdc77b59bd8028d65ca1468e51cb7b17183cc0bd4adb4103835537ec32a9854
154 Risk Score

Malware Insights

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

This PDF sample was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple external PDF files hosted on compromised WordPress sites and disposable domains. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9496

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://kojeneckezbozi.eu/userfiles/file/fapuvoroxoviritov.pdf In PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607623d45f1f2---32369244470.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/vaxixazozutebe.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607114d4d8403---37184714435.pdfIn PDF document text
    • http://citysuji.com/ckfinder/userfiles/files/2632628376.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/23896059093.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/wotetasabesodonemazetu.pdfIn PDF document text
    • https://o-dance.com/upload/files/duvoxoritojekuxupeluxa.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/sebokegogetipa.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/lebur.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8571aa9b6---donigixixul.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/kr1e09c3c0fr84ib0lqdji1352/1651449963.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087385f0a521---43862699106.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/27976550687.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072970f61bc9---41508429376.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/f6cf2896667c38f074f6db81fbeb7ca8/5312566548.pdfIn PDF document text
    • https://istanajp.com/contents//files/fufuwuzikokiv.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbc16cf7ad---78598471660.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/kurunitowilitunowisarawem.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/76421125392.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/58736365983.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b167fda3316---naxofu.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/bce07dfe7a559dd41bc0eb56260496f9/xuvonetanewivowabijazib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=genotype+for+red+hairPDF 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_off0000be1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62D 15556 bytes
SHA-256: db8f36eb91424ca02063fff0e63a6649a8804505606e746163d131a752b531ac