Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8c4a1eaa79372b…

MALICIOUS

PDF

52.0 KB Created: 2020-11-06 12:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d80fcbea02e409bcda278f6d7296e150 SHA-1: c8e3d1fc1ece52aa61bd94e0edab28631b0638ed SHA-256: bd8c4a1eaa79372b02eebdeb5945b9ba8d9e7d9a2e2bee12816e7461f9076989
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://traffine.ru/123?keyword=jellyfish+reproduction+method In PDF document text
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/nevul.pdfIn PDF document text
    • https://pagapepekajarop.weebly.com/uploads/1/3/4/3/134307963/d30d6e3db1e.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/6de43.pdfIn PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/tapefaresavovu_jugowuzapasi_bixulabidapek.pdfIn PDF document text
    • https://ruzasamevu.weebly.com/uploads/1/3/4/5/134591323/wigot.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/8fd76c.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/53ede8bb-48b2-4f93-be11-433154a39408/download_shottas_movie_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7b6071f-816e-4328-be84-bec1645bccf6/kilatubazin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/211b9e44-0b0d-48ee-b910-03f751574ae4/tazipegifowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a1d4a23-48d1-4d9c-9a81-701b98765183/olafs_frozen_adventure_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ade18d41-4aa6-43af-94e4-6107d4d10b25/constellation_worksheets_to_print.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/959043c7-60c3-4fc4-8a64-ee3433f85afa/todiva.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/muroj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f693779-51c4-48f8-850d-c0dde02a8211/23904184048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c2268b-37b0-4353-b67e-765ee4a5f184/11984509628.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/suwotupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15ef677-0e7d-4cdc-9ad5-b4b3657bd60f/86169111381.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_off00007fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBB 5156 bytes
SHA-256: f65c8b98d55134bac6f80a25ff4d8a7814f2dc71782f32f65d96d8ec52adb27b
font_01_sfnt_off00009118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9118 10528 bytes
SHA-256: 0703cf3f44e433a965688b3e19c6d13b8ef3bf631d22e3a715f84fd64f332bbc
font_02_sfnt_off0000b524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB524 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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