Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb20c38deb4c8ad…

MALICIOUS

PDF

65.2 KB Created: 2021-02-18 07:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: fba4abef642acd2092d5ae5427bfbfee SHA-1: 8d7906641ab22730af465d4276191dc8ef499307 SHA-256: bdb20c38deb4c8ad9627929863af7bf5a5b5f7c61f5e6aaf35e14e9e9a18bd4b
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=billy+joel+miller+park+ticketmaster PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444882/normal_5fd323099f1e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5fd88cd8acaf3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417221/normal_5fcd64e99960e.pdfIn PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/figut_xivisorofepu_suxetagefe.pdfIn PDF document text
    • http://waneboto.66ghz.com/qs_world_university_ranking_2018.pdfIn PDF document text
    • https://zopojezumaze.weebly.com/uploads/1/3/1/6/131637354/a8c8c5f7b3.pdfIn PDF document text
    • https://pulakaxumif.weebly.com/uploads/1/3/0/7/130776647/f4cef99eee660e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427780/normal_5fe5286974c27.pdfIn PDF document text
    • http://faladen.22web.org/dijemeworuzumajogo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446270/normal_5fe5d4043bbb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446019/normal_5ff9ca30d0cfe.pdfIn PDF document text
    • https://wozexofinudere.weebly.com/uploads/1/3/5/9/135984457/5810132.pdfIn PDF document text
    • https://xijadusulotogu.weebly.com/uploads/1/3/6/0/136089771/pitofu_nibomarizelis_wovijavi_mazutu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EB 5372 bytes
SHA-256: a9ff68fbfc539471e519ae2ff4a0f9d03c9947e82b35dccdee566507cf1c6c58
font_01_sfnt_off0000d525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD525 10272 bytes
SHA-256: c6eddb280efa78bd0504af1bf8a01671b9a69c7abf3add44e967cb44b7a8f6cd