Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee762dca52fd66dc…

MALICIOUS

PDF

80.4 KB Created: 2021-07-13 18:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b7c793364573125cb429eabbd34c0959 SHA-1: 5fe80148e3f587281fa28c08f77bb80ed870e969 SHA-256: ee762dca52fd66dc0af4cb2c05db4ea2ed5b11a4e8c9e632ea0763c50c55cb3c
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely contains malicious content. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, suggesting an attempt to redirect users to phishing or malware-hosting sites. The presence of external URIs and link farms on disposable hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5698

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://oniceh.ru/uplcv?utm_term=give+not+your+strength+to+a+woman PDF link annotation
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/91b0c46ab0a5394db1251adc280c51be/tomukaleve.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/0c13elahv0ghjkn6edvpuru4i7/nekudidatojuxifiko.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/dagexo.pdfIn PDF document text
    • https://langumeistras.lt/i/File/pexeroxebexekibok.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/9opgglb3sv9mnckjfcba4f6n0q/mojig.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/03f6b52458917346ad4bc907dc9870f9/butagojixamosi.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/kubanunuvowadezatefufarev.pdfIn PDF document text
    • http://htwy.com/upload/file/zopijewibenimapetet.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/16ae03f1d1d82849c737c5a4d6d70bf1/sikoxa.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607133eb59080---36726822465.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/963ab822a275d0a924b4519ab82309f5/daxezamu.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/7hjogun6dst0v6nk1v2bk707l7/22024682940.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/f1c02ef08bd40f64829067ed5b6855f9/99394207754.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/789b8a21749a002a936638a0c013e9e6/botasererisijudaxuvasa.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/fexebedulukofinison.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/duxitidexawekotawex.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8924a3626---widugonofamekivotipodupef.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd193d53b4a---ximukodu.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/gilal.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607196b89c95b---jifofamivopof.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/jezikefoxaxigawugufubu.pdfIn PDF document text
    • 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_off0000f6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D5 16508 bytes
SHA-256: 94203ace966c11260c0db839e932367381f2f0a3c819a07aab60b568ef03759d
font_01_sfnt_off00012197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12197 10916 bytes
SHA-256: 4ff7aeeb85b03bb4c8d993169e4d50a51497907a8196faa836fd8992bcbe2dda

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