Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e184d26d5d5756…

MALICIOUS

PDF

44.6 KB Created: 2020-11-04 04:43:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: eed93edc3f6945c1c161326621cbf92d SHA-1: 33b733b23c6cb53788b78e3be8d8b8bcf7f02b80 SHA-256: 76e184d26d5d5756acea1da1209b904be57c807844a1bced863a5bcfc942b07e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?keyword=yadah+hebrew+meaning In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f8ba5756844b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389582/normal_5f95e0951571c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_5f98f932567b3.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_5f9ea02582ecf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e0503738-cfe4-4fde-9d3e-e94177e0c8a9/23408064513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ed794e7-674e-41d3-a4ce-630b92e36851/71482320863.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/74263208418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf721a9-83c2-45df-8ee8-e43b83cb0179/xajevevuduxawaboguloxefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348492f9-1c37-4248-bcd0-c3ad73c900b9/46348242537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09660ae2-8043-4fff-9931-dd41be110158/the_passion_trilogy.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E2 4820 bytes
SHA-256: 4ae3baf4c9cb48c1df80f9489e71a08698c8b1f9180b1e91d258e330c85933f6
font_01_sfnt_off0000751c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751C 10120 bytes
SHA-256: bca7c720ecddff39715e28cc6343afc171ca5a7b83faf88d2961d2ce25f8eded
font_02_sfnt_off000097bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97BC 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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