Malicious PDF — malware analysis report

Static analysis result for SHA-256 174185c4bf7bffb2…

MALICIOUS

PDF

40.2 KB Created: 2020-11-09 15:53:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 29a460bc8ee9df29ea4660dc6d36d29e SHA-1: de3fa9d53504bc4c3a101c6585383b338228a840 SHA-256: 174185c4bf7bffb28e2a31e5a757e3293169f8ebe8e086c7dbb2132ce7852a8d
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/123?keyword=dgcustomerfirst.com+survey+to+win PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403531/normal_5f92fcc4ac6ec.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/miborufevutu-dogem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478946/normal_5fa7496aab548.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/sojuravewi/34091822509.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/agapemail_control_panel.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/exo_members_in_kdrama.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/ravulodaloja.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/manif.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/zitigufizoxegutokapunefo.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/jutuxulimo.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/benelli_armi_spa_12_ga.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/sociological_theory_of_criminology.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_off00005db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB6 5244 bytes
SHA-256: e2387c9cc9442079cb57f4cbb1efbe3daa6e0c46838f622bd70e6b4091011e89
font_01_sfnt_off00006fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA9 10808 bytes
SHA-256: c5c13c6535ac3587b0a1a3b950e111268bcc5614762f68f3dc05379be4c433fa

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