Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2a6c20cd87f63a…

MALICIOUS

PDF

41.2 KB Created: 2020-10-02 05:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7ea6de3813595d0a3388dec1847c52a4 SHA-1: 72719c3b85e0c98c0956cb763ae0e20ccc5f5d7a SHA-256: 3f2a6c20cd87f63a1ce8a1c4b7f19de4bb7b13081c82dd809c9d3b20d1cb895b
184 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.
  • 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.
  • 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/strik?keyword=family+tree+worksheet+in+spanish In PDF document text
    • https://site-1040764.mozfiles.com/files/1040764/sogigujak.pdfIn PDF document text
    • https://site-1039562.mozfiles.com/files/1039562/64129802087.pdfIn PDF document text
    • https://site-1037274.mozfiles.com/files/1037274/guxumaxalomawokiz.pdfIn PDF document text
    • https://site-1037274.mozfiles.com/files/1037274/807366339.pdfIn PDF document text
    • https://site-1038770.mozfiles.com/files/1038770/gekod.pdfIn PDF document text
    • https://site-1039167.mozfiles.com/files/1039167/muvaregoxefaligofu.pdfIn PDF document text
    • https://site-1037098.mozfiles.com/files/1037098/24922510204.pdfIn PDF document text
    • http://jazaxop.thepowissettgroup.com/uploads/1/3/1/3/131379685/gefuzokuminarukarof.pdfIn PDF document text
    • http://files.touchedbynishi.com/uploads/1/3/1/3/131398473/ec4ef.pdfIn PDF document text
    • http://files.pagingoceanside.com/uploads/1/3/0/7/130775304/ccb77.pdfIn PDF document text
    • http://dotepevik.resumephenom.com/uploads/1/3/0/8/130874493/gurifudizugano_ruwupugevi.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/ed340c39-1702-4f06-97a4-d378a49ea8f8/nelunixuvowibozom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da011e5-029d-444c-ba6c-3af419cb890c/sanafagon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06002de0-a124-4041-a110-4dfdaf38439b/mezukogevulirojivimobiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fba97ec-7cd3-42d0-a9ff-320bea69124a/19137801033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/444c42e7-e4dc-44fe-b176-8f5f57b68739/10331679187.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F3 5272 bytes
SHA-256: 8cb1362843984a4ec4f445f123180404c9700c238cc400613ac5653443232292
font_01_sfnt_off000075ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CE 9880 bytes
SHA-256: bc24e248144e3b1dab02dbe7ded17a3724c6df010469416067b0641d361f60cb

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