Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fd5d6ad953e20e…

MALICIOUS

PDF

82.9 KB Created: 2021-06-30 23:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 2912ca8dc6cb1493f8037ecaecf24f03 SHA-1: e90c401a4b89671a5046cebd7cfa5f90fdccae8d SHA-256: 96fd5d6ad953e20e8a30b8af00f4b6c8ef5933069de8411a4faba88aafc71e3f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The primary attack pattern involves luring users through a malicious attachment to these external resources.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3396

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://medvor.ru/uplcv?utm_term=how+to+write+diary+entry+for+class+6 PDF link annotation
    • http://alkanboya.com/files/file///17618141696.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/a88cfeb4619687c48fbaad498b89901e/gilir.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607714a3405d5---rajisumanegodarowe.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/xisorelowafogub.pdfIn PDF document text
    • http://charivne.info/images/file/99834725690.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160963748d02ff---pobetelajipedepiv.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607744ce9e477---62896449993.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/37736026109.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/8e18b0f02f3652cec2b1b2284915c716/gaparomeduviju.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/rigananetudizodakekak.pdfIn PDF document text
    • http://ministerium.pt/files/82236480475.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/1d6146ada34a71c689f2525d7663f72e/nabafakajanofujufakeg.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/1f9549b3841e2658193d730e1b6a0100/8532607678.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/adab75ac1bfc98cec2674e8433f6e9a5/gobitejanademamitipidi.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a90a5c85aea---xixafewelevu.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/junarogikomupefaruneji.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/pilikapamuto.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/9llgno6dhq9m3evt9onnb38s74/bokuxesusi.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/b9c82a2367909aa166f1b84fdf417505/55611597658.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/803bd335c88d3d1016f7bff6d353515c/soxopig.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/rjjgh9slvgu8nnf0um0b0k3cjh/15367387509.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/2433587a4bc5220731ac9b0a6f6ce520/85021562849.pdfIn 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_off0000ee8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 16944 bytes
SHA-256: 79e13ef9706560ffc5d352abab50b1bc0d9c4df86e90bce68ca5985f737ebc3b
font_01_sfnt_off00011a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13247 10828 bytes
SHA-256: 92a0c88cc1f072333b9e448cf67e0b2a0349c1bb488fecde0ab1e0c69a84be8f

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