Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47a319e9b46e7c3…

MALICIOUS

PDF

70.3 KB Created: 2021-09-17 20:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 02aaefa01e9e4d452a54c8841fc579cc SHA-1: 76327f5767af09a2f48e22ddb8622d26f739b35f SHA-256: c47a319e9b46e7c3355cfd3b05ad3c9751bdb1414f6b9d8c8e654ff82fa2a481
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised WordPress uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9156

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://drafthe.ru/uplcv?utm_term=subway+surfer+online+play+free PDF link annotation
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613abd030fcf7---62252312554.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/lakeke.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/xasewetefegegosaz.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/1544201bf9292e7865dae40153e72263/wejikajotazo.pdfIn PDF document text
    • https://33mobility.net/uploads/files/31805135066.pdfIn PDF document text
    • http://wasserburg.pl/userfiles/file/vudaxobas.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/17871584720.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/kokovevasojipiwaxoxapewik.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/3f111f147a7dcb5a0b64c830fca7c430/bapaxex.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/85e89819e502d1c8171049a27678eb4c/71006008651.pdfIn PDF document text
    • https://pustelnik-budownictwo.pl/ckfinder/userfiles/files/61957571960.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/835807a8d5c278f9d6fe9d4312c260dc/40806852016.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/wefew.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/fimejobij.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/numomimozulobazoba.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/br5rbe05odb0om3ph42umbuf2p/dudibemoniz.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/roxosejapuronadux.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/venemovepuzilazejelijewo.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/70905594089.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/ketovupamagipamumi.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210911072144.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133ee3de9b91---40055911722.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/72730187493.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/mokosabevawiwewatines.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210914_94B4DDF7FB7E6553.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1