Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e93e5907222e085…

MALICIOUS

PDF

41.2 KB Created: 2020-11-09 07:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: c1fde2f9720f7227ea83d8322529c6c3 SHA-1: 76f7b687cab997771db2f630e08a99cdd728ccf0 SHA-256: 6e93e5907222e085df556d7d897d2e8ab5ada2b18cdbebde926e9cf76eebfd3e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=download+sega+genesis+apk PDF link annotation
    • https://lekolusogi.weebly.com/uploads/1/3/4/3/134365603/30f43.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3029889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489411/normal_5fa8a66e61ec5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f950dc18f53d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8724b56917a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f87a86e5a836.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/b72a094bb7.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/7176823.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/db581401-6a65-4f9a-9b01-dee1a119e278/temas_actuales_para_jovenes_cristianos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79d4892e-9bca-4b9f-84fa-4c8c7553f803/xezorasuwirowap.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_off00005d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D15 5188 bytes
SHA-256: 06c74616f6d026776a0e4c6528038efd299ce1bcc8b7149ab9f57b1f4a29d15e
font_01_sfnt_off00006eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEE 11856 bytes
SHA-256: 49bcea9d401713104c7d24c6c4b742dc5de977ad05868002eb0cbb890c3c9db0