Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee885b5bd28f3ec…

MALICIOUS

PDF

81.8 KB Created: 2021-07-01 15:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f7e8f423bec6723b924f0f30bd0f54cf SHA-1: 8b986a0e88690d37cae84eec01a4a586268257fb SHA-256: 2ee885b5bd28f3ecddddf0adecbf7665ed931878b6f51a2d07e54e27475e4c30
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nomylo.ru/uplcv?utm_term=f+stop+and+focal+length PDF link annotation
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/9foijudnj9a443ue5e173v0ned/bemum.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/85529713183.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a910d15702---memamokuse.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608e702723095---pufavejivogabegugugopox.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/19748265723.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/gifivobenufosidazuzi.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/41d18efafd69bac00efe5e269ac1601b/davevoxuvurebowawesizeto.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/c95f927a5e177152b10f8c7d0ca0e03b/74472150959.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085df99f2257---52756402775.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/30901421157.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/kilam.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/10149711337.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/3f8fcd2e43b77f0cc3a12c462283d39f/23911114496.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/xetixezimotupubuxopikom.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078699637d3f---59470186363.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/52081475790.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/50378038691.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b34eb25fd00---firem.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607094d091ab4---90706355847.pdfIn PDF document text
    • 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_off0000deb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C3 16648 bytes
SHA-256: e23cd96a51fbc86f3489efbb4424ecf04a6cb770078ed2dc6ce735374856df17
font_02_sfnt_off0001221d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221D 10684 bytes
SHA-256: 552592662524d92cdb260b93db90d1169900e1d60bf0127ca70665667cf57dc4

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