Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae3c8c62bd71f3e…

MALICIOUS

PDF

61.2 KB Created: 2020-11-07 02:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ed1dc389e9a36b613e4a4cc99c06a827 SHA-1: d9f6b6c7288ace121a1f7b8ab095528b93f37839 SHA-256: bae3c8c62bd71f3eb59d46a44a4e64065e1dd0203dc82f550883438da4fbd67e
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://traffmen.ru/123?keyword=how+to+age+up+a+toddler+on+sims+4 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_5f90bbb931b26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f9eee2dcf7f4.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/rinedufiwaditarip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425005/normal_5f98974ec8ccd.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/0aaa04a0-7b08-4f92-be38-e34faeca48d6/dadasoxuwid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3849a79e-4731-406e-825d-0ff90afa4dc9/rajavenopimofunavelotag.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/rudibebatawarubetug.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/equations_and_inequalities_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f038ffdf-e2ac-4c4c-9b87-3fd2d6a60164/10462467475.pdfIn PDF document text
    • https://zedapakaxivi.files.wordpress.com/2020/11/fupapifowe.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/extreme_car_driving_simulator_hacked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/nevaeh_buchanan_paul_miller.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_off00007a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A62 15820 bytes
SHA-256: 3ba7f8d3c7c1aaac835d19a81bed386511ab3d35eca4ac5967a3f6f7d9b532de
font_01_sfnt_off0000ae23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE23 5420 bytes
SHA-256: 43cc437a07fe65046f9ebab158b8d177401d11de385381728c6c868022169e1d
font_02_sfnt_off0000c094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC094 10620 bytes
SHA-256: 70ee7f6be5461ff8432f5d51718b90ef678bba7bab5b353ddad3f0b1c4d8163f