Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f5275c9cd475db…

MALICIOUS

PDF

47.1 KB Created: 2020-11-06 00:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3a4052c9d8a6576eabd0d2af9d2d898b SHA-1: d079770563251bc763d70374e5ccc2d5a30ec498 SHA-256: 84f5275c9cd475db1435b8a01316424136b76114130baf06e3ab807097228cd8
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://traffking.ru/123?keyword=pse+brute+x+owners+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_5fa0619e62a1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f8b5697be88f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_5f8c4bfa1fd6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457563/normal_5fa10bf07b545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418985/normal_5fa47f37ba905.pdfIn PDF document text
    • https://sebonegipuwi.weebly.com/uploads/1/3/4/1/134108682/jopodojaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f9a4ee535379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418565/normal_5f9d6875a89a3.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/c360fdd6-aa6e-4d14-927c-e6561e907464/porters_five_forces_analysis_airline_industry_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5012eed9-6c46-4721-8a6d-f7eb83904a0a/22458285696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79dd7124-b62d-4c48-98cf-7df7f9c963e3/empty_plate_coloring_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d44fb57-fdfa-43aa-9afd-0e7cbd741843/feveralomogagonutesisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c39e10-cb00-44ac-8b0b-e3108781cdf1/manual_for_haier_window_air_conditioner.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_off00007a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A89 5132 bytes
SHA-256: 20e2c4e552a3ff425f8d2cfa98dff6fee736495df5f7a2a3f2c757365eadeec4
font_01_sfnt_off00008bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF8 10400 bytes
SHA-256: fa26be4f2c30854cb3431eeb8f3b0020737f2c604bb6058d62ef4c679cad0ecd