Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eebc65e0ca442ec…

MALICIOUS

PDF

73.7 KB Created: 2021-09-05 19:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 3c26157b96fcf91e04295db9c76134a2 SHA-1: 7cc679eb4c9323a9c9f160871d3db83c1aab6f48 SHA-256: 9eebc65e0ca442ec791475ed63b99654958a5e53f5e6e3c1ccc503dd491a7df1
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, directing users to multiple compromised websites, including those hosted on WordPress upload directories and other disposable domains. The presence of numerous external URIs and link farm heuristics strongly suggests an intent to lead users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • 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.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/19122586255.pdf In PDF document text
    • https://renetravel.ro/images/files/27552949342.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/6c93ec356b25841a4431111b5b6dc9eb/9723792387.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/7731980713.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606cc1dddfd78---17221554434.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/30508400411.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/tagowugil.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/cf81c1b89d8c67fe431f8257103e585e/21084418557.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/m0uis89a9n89j2u5hla3ne2m3q/vobubetiga.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/suxirovibedaresejamaw.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/fer1k12hr2bq1setpods9p5dr7/76664230733.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/duvivatikir.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/a9ee04c8963194e5cac20661b69b1d05/27605224717.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/sdjjr5liopfoq6fspu12rs4pt5/jewili.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/lelalozemupapunufiful.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a8cb8a301---bobosizinotudutoxurop.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/r98m7g6i5h9419d897a6hirt69/bexexixigotexupek.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/80432741272.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/finimud.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/raxoxemidodelevawoze.pdfIn PDF document text
    • http://www.celso.org/download/94491148362.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/nupp3honsds7l0fkrnejpeg3kp/17025478430.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=scag+liberty+z+52+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48D 16968 bytes
SHA-256: ea645db408878f2008e40f6c3620b4ace6e685d61224f92ca00ea92f742559ec
font_02_sfnt_off00010037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10037 11028 bytes
SHA-256: 89c15d44c5f399bc20863ecb9f27dd85becf5d6dda64bc2c97db858ca0e42197

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