Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee00ba3e11ef1779…

MALICIOUS

PDF

93.6 KB Created: 2021-06-25 16:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea86e154448de281dbf52c08304a1a86 SHA-1: d8d26cda7fc77808be3a935a93dfaeed8a2d19eb SHA-256: ee00ba3e11ef1779fc15ffd068da58b4303fc83d9c2e02757e412db1d06ae8ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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
  • 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://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a87fdcedf24---27602249418.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/apm8a1hs1ps0aig8798n44uhn4/36959955684.pdf
    • http://perilatomsk.ru/ckfinder/userfiles/files/90666406461.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/uq4frsv5s34im3ckfsg8opesl4/dapemulidonugonobagawi.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/cc41370f01676ab22be4dde5d36ac82e/zikakazudosojowofa.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e1f7d3c8f---67728782806.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160886eb78de41---21928559223.pdf
    • http://telekommarketing.com/firme_data/files/63672485668.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ca6b1a6dc---31340773956.pdf
    • https://cowichanseniors.ca/userfiles/file/69386295091.pdf
    • https://jaiminsales.com/ckfinder/userfiles/files/movurenivotelalad.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/0894236644a2280fa46967b011e97108/66031107658.pdf
    • http://aucoindeshalles.fr/menu/file/fenegakibigulupunuka.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726dda06891---liwufipudekugogukewugo.pdf
    • http://riverbendhay.com/clients/4/4e/4e1cbd84181290ddb66fb035c9950ff6/File/15697665574.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=the+belt+of+asteroids+between+mars+and+jupiter+is+probably
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/eff61ce48d0da0d2703b0d2e1a6d5da7/vugijajul.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ae6.bin
183ef026fdca0308d72430226dd90e9aff48c716d41fcbd8ee3f90a78f693369		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE6 17156 bytes
font_01_sfnt_off00013716.bin
f65994939e750de818ee922dbdb87c44d476df982236249ef38c04877f289e19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13716 11296 bytes
font_02_sfnt_off00015145.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15145 16792 bytes

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