Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bfdf2d8f76c61f2…

MALICIOUS

PDF

63.9 KB Created: 2021-04-29 02:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77c72eae6dbbbfd85532ff10fcc330b5 SHA-1: 067ccca22840eff512914a848f6a08a474c4da1a SHA-256: 3bfdf2d8f76c61f26b1a64996d71bde162e4d5daebbcb4b7d2d519a552590e78
124 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to compromised WordPress upload directories, suggesting it's part of a phishing campaign to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8201

Heuristics 4

  • 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.
  • 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://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083f2e3bb3af---25339120341.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607594f553c10---jexiwogasuror.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160803ef0048d9---4972828780.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/0q9u0i5ahopfe7cnf7h33fk7e6/jigexijedobiwasedavomose.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160746f8440db6---26256097024.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/53523629927.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/fiiks9a13nkaa5nbhrsg5hnufm/jumadujirasemukubexokim.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607de796e52ce---futowud.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607035d38cd02---vadebomago.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16071854a3b7f5---jomozosa.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16085806af042a---tudaturegiginotuko.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f66ae876f---lunuxo.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc5a1bd781---87439990879.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/rbq8b8pe0qg6crdbuqinls8ob5/mevurixadorubav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=aeronautica+imperialis+2019+rules+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77b.bin
6be6641376f4271eafdb9d42b86283c771cd633de5c2f63013927c88685336d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 5772 bytes