Malicious PDF — malware analysis report

Static analysis result for SHA-256 6145b09895bc5505…

MALICIOUS

PDF

44.9 KB Created: 2020-11-08 01:15:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b110ad489e126648bbfc9f6a6b4fdf61 SHA-1: ffd36360f0ab2810510ff4fd27e5ddb7074bc2af SHA-256: 6145b09895bc5505b9925335b2f43eaaeb894b64313218aed2869c67b07fb0c2
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/aws?keyword=hulk+emoji+answers In PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/nulifiwid_raxajijoras_ninuvekuf.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/36305a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/10915381615.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/61365136550.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/nevofuvoz.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/73707661800.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/pdf_to_word_converter_online_with_ocr.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/frog_pond_farm.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/dow_corning_795.pdfIn PDF document text
    • https://teviwuder.files.wordpress.com/2020/11/tivavonupuwem.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/59992407251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00eca13e-fc02-42c1-bd1d-8d6b70d35fde/numubanov.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/regular_show_benson_age.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/kizaxamugewitezavisub.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/jelidoromox.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/working_rap_codes_2019_roblox.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_off00006f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8A 5024 bytes
SHA-256: 87fe43ba76ffa68a9289311c61627f14df46540f292cd50c2fd0c61f2915abe3
font_01_sfnt_off00008091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8091 11168 bytes
SHA-256: 109e504bbbdb30a78b9c0db4b5d5da56ac60b7a0b4365b8bb9a780e77afafa18

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