Malicious PDF — malware analysis report

Static analysis result for SHA-256 2025e6466f9da092…

MALICIOUS

PDF

81.9 KB Created: 2021-04-08 09:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6414f01e840c734598061a8bdb77908a SHA-1: 99b50b51e5625e13b51eed0a38c8d3f6225f58c8 SHA-256: 2025e6466f9da092c450080bd37bc86acf63590bc3a50f34cd4a9d78d76d95cb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The document body, though heavily obfuscated, contains text related to 'halo games' and references wkhtmltopdf, suggesting it's a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://botokaw.ru/strik?utm_term=all+the+halo+games+in+chronological+order PDF link annotation
    • http://my-favshopc.online/30916135395uc25g.pdfIn PDF document text
    • http://expressvpn.store/63368009847o2pwg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475847/normal_603e7df77823e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_6041759895c0d.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/8720446325x3bl4.pdfIn PDF document text
    • http://curvepreloved.com/bissell_turboclean_powerbrush_pet3ct60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382965/normal_5fde930509bcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_601eb5b677f9f.pdfIn PDF document text
    • http://hangookoil.ru/lsc_smart_connect_applicationmkion.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465690/normal_5ffbb12edb25b.pdfIn PDF document text
    • http://cashbackk.site/womapuvomoxajofahbl69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448746/normal_5fcae7a91f687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423462/normal_600bfbbf74049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466996/normal_6027feff4bb1c.pdfIn PDF document text
    • http://krepezh.guru/nomujefipugubwx1u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/migivewuwe/7346439751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc450e58-b6e8-4b37-84d7-083a7b70aa14/return_ascii_value_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fbe6108-f2a6-42aa-b8bb-00e8c27eb2a1/79396739803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6206a45-ae6a-4159-9338-8f6c25dff4be/dorian_gray_penny_dreadful_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eb2e4e9-2bf7-4c95-af3f-2fc66152067b/43088554574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce15163-d885-45f1-bbe6-ec6447a2a5b2/belegowelejoxowa.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/chennai_express_tamil_songs_kuttyweb.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D0 5128 bytes
SHA-256: ef7f2a5080317597fc0b5df4fe74c34eb0ec991fbfe4929c9a2d1991bcce3640
font_01_sfnt_off0001050f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050F 10824 bytes
SHA-256: fc0c665cdc4062bf969d6b7ebaea99be3652321df059a3aae585c05f2ef6adb8
font_02_sfnt_off000129e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34