Malicious PDF — malware analysis report

Static analysis result for SHA-256 808ee2753ba47fb8…

MALICIOUS

PDF

44.5 KB Created: 2020-11-09 05:21:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 8fdaf737cf17acd0e541b5b131dc8a90 SHA-1: 79b57b47ab269aed2353265b46b70c61cf190d6a SHA-256: 808ee2753ba47fb85cfa62ec4adcb943e47710a2afad42eba680ed1f0e785853
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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=digitech+rp360+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415045/normal_5f9a1a3d6fd7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f871cbf582ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379970/normal_5fa4d7848a030.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/kofabube/order_of_the_phoenix_weebly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd12f8b6-2d41-4047-8047-c40111b1123f/97303743616.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/mexenaput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9af1a22-9582-41ef-9738-af30b5f1b18b/react_native_cookbook.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/vilagebopusur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44bd236e-507e-4c2c-99c4-5668bf10c134/55662189490.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_off00006ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA2 5848 bytes
SHA-256: 77495223e88dd731317c8b769ca9d07dccf6cd939e7621370f67925a99ea154a
font_01_sfnt_off00008067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8067 11004 bytes
SHA-256: a97f01549d3e22957544dcbdc2091786927035c95f989f4869bd480a9bb0ce41

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