Malicious PDF — malware analysis report

Static analysis result for SHA-256 1249e572e29b6bfe…

MALICIOUS

PDF

63.6 KB Created: 2020-10-08 03:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c0ad258cf896ed03704202d75fdd39a8 SHA-1: 8028e5b42391b9e530c1a6c72bf3a60531a33295 SHA-256: 1249e572e29b6bfe601f4327f6c7e8f5b4e18758284b5502bac645b2517c7adc
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/strik?keyword=payday+board+game+rules+parker In PDF document text
    • http://files.eggharboryachtclub.org/uploads/1/3/1/6/131636728/12ef09fc4.pdfIn PDF document text
    • http://sofok.kirbyonpolitics.com/uploads/1/3/1/4/131407406/jawopowufake.pdfIn PDF document text
    • http://files.svdreamer.com/uploads/1/3/1/4/131454373/8fd1b0db39a.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/a0999308-ae01-4cd1-8c56-97ba4a240c85/45024326170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb58054-c206-45af-85a7-35f616403885/furawoziwevofaber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a11942b3-dc82-4bfb-9605-d6812235a72b/lirofaropisaxobup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/960c2646-aa0e-4a32-bdff-859892fd1a84/gamemolajoraxafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31d2069-fe01-46d9-b08d-6c7fc22abc55/rubisagowudesasam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/430b3019-f0f4-4b16-a216-905f4b1bc045/povaxuteramob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b69366-f757-4982-bd7f-1ac3b4fb5814/tawabunanav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/057fcd8f-0ef9-4c0e-bcb7-61d1bf19b12a/33515161087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0be917-a227-4a74-90d1-42e5a23ec9a6/92783815692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/546532ba-0832-45ea-af26-6ed5d0b9ebc9/vakumoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c228efbb-637b-4b20-8336-77d77cf6ba3e/nodaxaxubigow.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_off0000b9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C2 5584 bytes
SHA-256: 723dc419236dd8f89d736ce41a64fc928ff69638681149503e9824a14453dd33
font_01_sfnt_off0000ccb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB0 10768 bytes
SHA-256: 475f210220d5797452cc7652673dd3b186ba8b963a820d047bd63628daaa77de

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