Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a0470898c7f838…

MALICIOUS

PDF

54.2 KB Created: 2020-11-08 22:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 8f11f58a29df1c3d508828cfb446bb62 SHA-1: 93d4a10b8863050c3d6d4f930d59dd6b3c3833fb SHA-256: c2a0470898c7f838da9cfa5e4d1256dc7d5673e580aca09da969542d1cffb737
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffking.ru/aws?keyword=pathfinder+kingmaker+spider+cave In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_5fa25cfcc42ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f93e0792ed61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f8fd59e6e4f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_5f983f7218805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_5f9bca11236f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_5fa15de9b9250.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://uploads.strikinglycdn.com/files/6f6ff89e-bc04-43c0-b9be-6a7933f58b4d/jeroxotiloladubijobifole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b75135f-dbb2-4490-93d3-7a6f8ede647c/65226646850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/318b1c07-7c7c-4a37-ad97-8dc75bb30c26/contiguous_united_states_highest_mountain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bd31191-260c-474e-bd23-5dd78ec44b96/67733199450.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_off00008461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8461 5340 bytes
SHA-256: a42f70deb3a1d88bc80aec0b7ef8b83a0d374638714869ddfaf2a7fd6918b9af
font_01_sfnt_off0000965d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x965D 11148 bytes
SHA-256: 61a9d26e9498a174f841fd94a0ba45354c1a978cc9f79bd489cd7ee4d32a666d
font_02_sfnt_off0000bc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC60 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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