Malicious PDF — malware analysis report

Static analysis result for SHA-256 055efc9cd653dbf4…

MALICIOUS

PDF

94.2 KB Created: 2021-08-24 23:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e91644b91ce43a40c693f32fff4aa81e SHA-1: 113b613206990f244bfe91a57b8e251094409b20 SHA-256: 055efc9cd653dbf4782e7a13a8a6e958e45d54149c65c6c9f4dee23e56b0da2a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. The presence of a 'LOLBin run command' heuristic suggests the document may attempt to execute commands or exploit vulnerabilities. The primary attack pattern involves directing users to potentially malicious URLs, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://lesartsdansmonjardin.com/userfiles/file/20210721045756.pdf In PDF document text
    • http://abnicum.com/files/file/16011026035.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/nududekaraj.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/rutebezofowi.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108d974c920a---72725467359.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef4c37bab9---kazijojifurimoxuzufujuvu.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/ri492pi8sprucmdeu7u5n530mn/lufawufiketaxorapasix.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/93880514659.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ffa23358249---82674091189.pdfIn macro / runtime command snippet
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098bfba29612---tokadaribal.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160886cb5bd5a8---gogonasonapuloduzaluva.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/fe53ba727ef40676e113c6117e3cddc2/jazamereje.pdfIn PDF document text
    • http://cy2hand.com/userfiles/84312929601.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/9d440a5b632bf028b99d6265ea2c3e4c/30192611332.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bpj4uptdd6caaeon9tvfsl7a92/61214388484.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/161158931d30ea---lujabiper.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/pigas.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/70533462133.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/xusubok.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/zisetivowo.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/vobesaniwojudekarob.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f095e3fc3a---lijepa.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/ruxipabetamasunoxazowebud.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/51116928607.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/626a96fec6fd2a6f9dee0667eafa1fa8/34518548033.pdfIn PDF document text
    • http://triple-a.coIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=the+most+expensive+house+in+gta+5PDF link annotation
    • 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_off00010ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE1 10920 bytes
SHA-256: 0cf3d6d02836eb84d19543a8a4d3d66e92099134b87a47e0926dee019b725f33
font_01_sfnt_off00012426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12426 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C38 17456 bytes
SHA-256: 8a62083edbe123cc9cda0e176eff0f217a7e5abb1a2b9b0da7f12a0a77c8d905

Open this report in the interactive analyzer, or submit your own file for analysis.