Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb1967251bc5954…

MALICIOUS

PDF

53.3 KB Created: 2020-09-30 02:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8561edfc8ddfdb10493fd8d71327585b SHA-1: b987ac57567916cea5fb1c253f55efa21aa4fc30 SHA-256: cbb1967251bc59542f8d1619b970ecb963e56809218bc68e2356b09ed3f6a934
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://ggtraff.ru/strik?keyword=increased+intracranial+pressure+pathophysiology+pdf In PDF document text
    • http://lugonug.twentytwojuice.com/uploads/1/3/0/7/130740292/japegar.pdfIn PDF document text
    • https://site-1036996.mozfiles.com/files/1036996/diderifo.pdfIn PDF document text
    • https://site-1037196.mozfiles.com/files/1037196/97040758936.pdfIn PDF document text
    • https://site-1037833.mozfiles.com/files/1037833/27356182845.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/3b0a6546-86d3-42ba-b601-e9d77c1645d9/guwogojotoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e85262-d0aa-49c8-8dec-dfd24d9aae1e/velagunebopuvazagukoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9e8589-ac03-4c31-989e-e84642f397a2/xikanosuduwexefupise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ed00f9-dd44-4d70-a29f-6869cfd16d58/pasidokoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efc692bf-1781-40ac-b0c7-2681fb0500d2/milepekexalosogexitofopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f543aa78-8f79-4451-a8f4-1d0a71c3b920/24414100882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8fa870-4b3a-420b-8048-534fa383ed09/zetodibi.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_off0000855c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855C 5340 bytes
SHA-256: 65d7b3e3d9408a55e3169bb7152b8323700fdace6a95c686662b81dfd9fee67e
font_01_sfnt_off00009774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9774 9980 bytes
SHA-256: eebac17546d7152ac9509560423e8b60b40465ae8106bc8d4d451dc937206a11
font_02_sfnt_off0000b99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB99E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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