Malicious PDF — malware analysis report

Static analysis result for SHA-256 700ab317b3c98013…

MALICIOUS

PDF

70.1 KB Created: 2021-06-01 03:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df83c797422cece9dd7e32ba5f21d4eb SHA-1: 3c427fbfa1b1c775e271bb53f8fbb10b028d3433 SHA-256: 700ab317b3c98013f500a5e65c8b8ed4a97a111fd914ae892456dcd577726db5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16099ad355e2c1---lilafepugujujeda.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fed99743e9---98225585632.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc2de69b51---pujufopoligiw.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/6975b4fb6e73f1f80b03bd5d9a6d2165/lizonejakenoxa.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a3fe05ab0---36740671121.pdf
    • http://esoftland.com/userfiles/file/12767863175.pdf
    • http://fontanarosaserigrafia.it/userfiles/file/95539282193.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb27527b66---pelimuledul.pdf
    • http://ventilatoryzlin.cz/images/file/votexozofazunuvip.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16075352ff1c18---2130699993.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/4049248a55ed07419b4a8ff4599c589a/11092580691.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b93912cd21---21973061035.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/101c3fdbd45d60c70d59f02eec9350d4/69885893967.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/oesn48e5f4dq1ic4minqli8qd3/saweviniz.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab36e7b5280---mirosowujatufanipojuti.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/5bd0a1a7520c58da73905c47c985589d/debitivoriremoj.pdf
    • http://dentherapia.hu/files/file/75274819870.pdf
    • http://momsystem.ru/public/file/zisane.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=diccionario+frances+espa%25C3%25B1ol+en+linea
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d283.bin
e1c02f4dda50208bfc693558acc89c4367511c2277301e8bd243c957fa0a53f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD283 5220 bytes
font_01_sfnt_off0000e41f.bin
870d979dba2afa32264d54791d0e5c3a846c06d7017c6d49d62e31c1923c1557		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE41F 11584 bytes

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