Malicious PDF — malware analysis report

Static analysis result for SHA-256 966bcd155b03f08d…

MALICIOUS

PDF

63.8 KB Created: 2021-05-06 14:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9b3ad29de6ed8f8f869a45cf994e41f SHA-1: a4e9fc1fbf667c7ea8f3b1f0913e9ec68e9a2da2 SHA-256: 966bcd155b03f08d5eb60fa3901e989770710d1f3b090e39ac2dc011eef0aefc
154 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external links suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8201

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://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/ebabcd6256a461195c9d058b5536124a/wugitirisogimibiz.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c549d4736---tevegatopilipozebuj.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607987ae314aa---46490184455.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/pvqbevtek7j95rr24igg6fmr2l/62653881618.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16071739890fcb---xerinerodupibofolifobavuv.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160860fc11fe9c---63543748680.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/tsuikcgdvhkjf2he3h0g1c9a50/42576972861.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/31a3e3dd9b080d9336e99ed089f18ca9/80302212721.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba485eaf9f---lagezajasagiro.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/h9tr67ast1msrp1lj1beq8m15c/wuxawawojo.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/ac816e2b8db9d44dc7cc7cf21869cfb7/45198854092.pdf
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/f41f0f6f859c44ae928ea6dc7027a46b/48278471915.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a0a75143f---jafaludakepalujusoxumamam.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160784fe6c948f---katodekexit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=phenyl+chloroformate+density
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2eb.bin
aa13dfd9c74d1bc16af9eec8b919e09bafdb0bec3eec140d3ef51dd62dd7c17e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EB 5364 bytes

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