Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c74ce5aa5ce37a…

MALICIOUS

PDF

69.9 KB Created: 2020-11-07 04:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: d9459853459d4b018aaabb281df854db SHA-1: e4254ec3ff5110931498ea9d03e0e8dc10138cba SHA-256: 04c74ce5aa5ce37ac7cceb37a90941458b8e13df533671ad6a638af1a8b5a3d3
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=dnd+3.5+glabrezu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5f8cf0148a0c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415974/normal_5fa2fc7130ab0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5f8d0752a2323.pdfIn PDF document text
    • https://mosodujisar.weebly.com/uploads/1/3/0/7/130739504/2e6e6f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5f9b37636db14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393791/normal_5f9c09f79a9af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_5f9d0471db96f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5fa09fce9fbb0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zapawex.files.wordpress.com/2020/11/osha_illumination_standards.pdfIn PDF document text
    • https://lalibakorex.files.wordpress.com/2020/11/wasowisigota.pdfIn PDF document text
    • https://zivumiji.files.wordpress.com/2020/11/zugedusuxawajogik.pdfIn PDF document text
    • https://nuziwonuw.files.wordpress.com/2020/11/72907951528.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_off0000d477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD477 5324 bytes
SHA-256: fd0ccbe2f34d05a1ec66b1caf725934a2b356aa411095cf2103b55cd623ce4f0
font_01_sfnt_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 10956 bytes
SHA-256: 91af9f06133fb9a4608b54e9989b8278e0466cac0b44dfef7a55e1a5ce7455d0