Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9abf2fb071d76bb…

MALICIOUS

PDF

80.5 KB Created: 2021-09-20 22:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dcb45f6971bedf94d565598068989335 SHA-1: 1d47fd70a9ae94a143e4e13267f5491855e4b117 SHA-256: f9abf2fb071d76bbf8497677d12de0701e90d6e72ba052a52ab2e0a186a0519e
196 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste commands into a shell, a common tactic for executing downloaded payloads. The numerous embedded URLs, many hosted on compromised or disposable domains, suggest a link farm designed to redirect users to malicious content or download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143603ba70c3---kegixagik.pdf In PDF document text
    • http://rulada.by/upload/editor/files/wajuni.pdfIn PDF document text
    • https://auto826.com/uploads/files/21794235885.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/kepevokubovetufubitar.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/geripito.pdfIn PDF document text
    • https://eurochen.com/UpFiles/WebEditorFiles/file/judijujututelosuwivol.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/joloxuk.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/bapimoxidepakewekuzigipuz.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3a0062aac---87687032841.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/5697217376.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/57376916781.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/39374938064.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/83200558217.pdfIn PDF document text
    • https://polytex.de/sites/default/files/40562567472.pdfIn PDF document text
    • https://superpackeg.com/userfiles/file/73696132012.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/fbt5vn9h8s6rs7bmr9h87kmi6d/35620658127.pdfIn PDF document text
    • https://jcmimoveis.com/userfiles/file/razevulipiv.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/20653818464.pdfIn PDF document text
    • http://spakimthi.com/upload/files/76685389363.pdfIn PDF document text
    • http://www.polni.si/Images/files/72076936575.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/42689821451.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/75415712961.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/8230545116.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=my+android+emulator+is+not+workingPDF 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_off0000d2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E6 10976 bytes
SHA-256: 7d99593cd88ada717d167d8638469b9b7f83cc95b84ed7ef534962847fa391ec
font_01_sfnt_off0000ec38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC38 18148 bytes
SHA-256: 96954c6436f49a9560a7fd9b81e6a8a34b70701b4803e9c199b586aa80f693a7
font_02_sfnt_off00011c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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