Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d44099facb6f1d6…

MALICIOUS

PDF

44.2 KB Created: 2020-10-15 10:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 44a5d8d418fb8a144b64a8d1d812eed8 SHA-1: 25d8ad37296cd9d8c6c2a53c0b6cd915ae9e333a SHA-256: 4d44099facb6f1d6d69e59bed5ff5a9176e6cd81c7f58c70c37bf87488b59f61
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://cctraff.ru/123?keyword=gba+emulator+android+wireless+link In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f879e98ec0c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f871201e8228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f874f587c879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f870e9898f04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f879e31dfc76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f878a527a9cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f8786c1d36d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f87e0a584984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f8774d64b2be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f87029b8ab44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f86fe96dbb49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8753e311858.pdfIn PDF document text
    • https://site-1040428.mozfiles.com/files/1040428/13619077518.pdfIn PDF document text
    • https://site-1048444.mozfiles.com/files/1048444/2576857077.pdfIn PDF document text
    • https://site-1044306.mozfiles.com/files/1044306/jigabejikonasudexigiwam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c6db8f4-59c6-4bd5-bec2-b9bd4faa1eae/madekezujazazeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d682fd4-76c1-422a-aacc-28a7d3e8409e/desivibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94baad20-6704-4a0a-b7bb-1118fe67f643/tigelovejitadefowisoxefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d6ac7b-d589-4ee1-81d6-6ebee7708828/13803751433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2c0182-e664-4ac1-ba3e-ce3e89b05e9e/54503444558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63033541-269d-4706-9d89-872cb751ed52/sokodekidizavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc7ea6ff-a003-4fa1-98db-803a9b662cf2/11134880432.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E61 5296 bytes
SHA-256: f65e8cffb85e05831fd7fe727ae58aef69774ebc5c6bbb6edaba913b0eefeeda
font_01_sfnt_off0000806a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806A 10360 bytes
SHA-256: d983e5ef4354de67f52eac2b43b5ab93a5e7910f27783e8bf3bd7cc6e7fee048

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