Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e9dc08aad9fb10…

MALICIOUS

PDF

58.9 KB Created: 2020-11-09 11:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: bbb603709c4e2eaf1f7278db30f0542f SHA-1: 243656086c45eed92f124682936ae76ef309d172 SHA-256: 36e9dc08aad9fb10771aca9f63872536a948e7dbc3b7a9f064333c0780ea9868
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://trafffi.ru/123?keyword=v+wars+parents+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f89acce65e33.pdfIn PDF document text
    • https://bajusokizuz.weebly.com/uploads/1/3/4/4/134400974/sesifolexo-kujiv-mapokovila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425514/normal_5f9945c31bdc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415748/normal_5f9a6b2573f72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5fa399872ab4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f8b31dad2f82.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/daniwodug/47823072798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f0e5ad-557d-4823-a82e-7deae31edcc4/the_alchemyst_michael_scott.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/6th_grade_spelling_word_list.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/best_app_for_live_tv_firestick.pdfIn PDF document text
    • https://s3.amazonaws.com/lopazura/modo_de_produccion_feudal_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/22503375187.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/8358182790.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_off0000a529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA529 5152 bytes
SHA-256: f36b767d6f4019f6967350f40bd10cb8db30102b8df91bdd88f533c523ea9a42
font_01_sfnt_off0000b6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D3 12264 bytes
SHA-256: d6a96bd5446be3f31fafc455d7e3dd8147627e33d20d35f34a0a304e24c3013d