Malicious PDF — malware analysis report

Static analysis result for SHA-256 b341146b2c5f6f41…

MALICIOUS

PDF

42.6 KB Created: 2020-10-31 20:34:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 2a9c76ad48a9dad29b5dd04a05d3e437 SHA-1: 6bf60e174d68f4e2d247a6763a43e0f0286565e6 SHA-256: b341146b2c5f6f41eb9fae78cd1e2bae135bdf612f0240bc8c3491630141c59c
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://cctraff.ru/123?keyword=earn+to+die+2+exodus+unblocked+games+6969 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f87c64a80dca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375702/normal_5f8b06c00416e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390637/normal_5f8e70932c4e5.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/7a33361b-7802-4158-a309-a8385a139fbc/muputebasupetutavirotere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d1217f3-f068-447a-baa9-99678945c127/35956939776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a0e8c1e-1ff5-4391-9bfb-2b49d043cfd0/tupomalaluroxeragebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6099/7529/files/el_conductismo_reflexiones_criticas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43260e73-eb5e-449d-8de2-03248e2b1107/rojelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123670af-81c7-4493-aea1-09a90d12a019/puwaporop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd4b72f-3e4c-4c94-941c-d7c04b3c3e15/can_you_download_netflix_app_on_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16069538-dfcf-4b70-a7ea-b5e62412d0f7/automatismos_elctricos_con_contactores_documento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc221e4-5e41-4d98-bee2-71884e82bae7/23278771982.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/47990895458.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_off000057be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57BE 5812 bytes
SHA-256: 357018a1e8dcdf63d2c1f79bc789663f214e1e691491316c5af37b6ae628c799
font_01_sfnt_off00006b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6D 10548 bytes
SHA-256: 0e0b839f8d4cbb451e7e1af85ab509474d2f25c73cedb2ac96e41515960aa4a9
font_02_sfnt_off00008f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F83 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.