Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad06faae08630fbb…

MALICIOUS

PDF

78.6 KB Created: 2021-09-11 00:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 96c6c62a4c65d394e0d7c0f0d73b21dd SHA-1: 274a6d4d8d2f8f501ff16f539fcb369c9f01457f SHA-256: ad06faae08630fbbfc4442a104a80ac9942ffc4fa9e7f30a1871e2a10d12060b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to PDF files hosted on potentially suspicious domains, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is designed to redirect users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/56040743818.pdf In PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ccb286884---9510557436.pdfIn PDF document text
    • https://themalc.org/files/file/wijikonodetuj.pdfIn PDF document text
    • http://potlista.com/file/files/13325787275.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/89446947100.pdfIn PDF document text
    • https://dp-silver.com/userfiles/file/bagazalatozozuwojujileki.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/17308346366.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/69088708165.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/84565987235.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/87242884068.pdfIn PDF document text
    • https://isagrinio.gr/userfiles/27697307922.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/zubajexuradobila.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/48314138901.pdfIn PDF document text
    • https://adikmanis.com/contents/files/51272278017.pdfIn PDF document text
    • https://freebcard.com/ckfinder/userfiles/files/giwidalofe.pdfIn PDF document text
    • https://ancoraeducacion.com/images/24790362516.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/161300af38f965---61911887042.pdfIn PDF document text
    • https://diphong.com/uploads/xeduxilimabotobokesi.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/bemamiji.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/78024958153.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/27824469407.pdfIn PDF document text
    • http://nepalbestcargo.com/userfiles/file/90625122624.pdfIn PDF document text
    • https://fratellifurloni.it/file/67114458111.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=which+element+is+classified+as+a+metalloidPDF 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_off0000cd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52E 18104 bytes
SHA-256: a212bb7a97c161b9c3b0961c1a35a96cafa39ba8fe14de5e6a3985f57575a319
font_02_sfnt_off000114c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C6 10636 bytes
SHA-256: 137a8224677f748b1e4bd2480914a2e3e7ab5695b013539bdc8dc03c466fa266

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