Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec52101aa732cea4…

MALICIOUS

PDF

44.5 KB Created: 2020-11-06 06:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 5d3e702614a8d9af8453bd1bf346c1b2 SHA-1: 4e7e2c5bfb8023bf2b11a38e882cd18586e7eaf1 SHA-256: ec52101aa732cea4a058a148762ffb1aeab9485208aa095799d67b66e9445edc
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=youtube+apk+download+for+amazon+fire+7+tablet PDF link annotation
    • https://mogawurid.weebly.com/uploads/1/3/4/0/134042680/1331599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_5f947bd0d4541.pdfIn PDF document text
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/9a02fbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393183/normal_5f95ad37b11b8.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/kaxukizemupewese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5f9e03d55c44d.pdfIn PDF document text
    • https://rawavofim.weebly.com/uploads/1/3/1/4/131452817/707393d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5f9b77af93bc3.pdfIn PDF document text
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/wunejasew.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/leguvefu/blanca_nieves_y_compania_english.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/cell_organelles_review_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aceca455-ee32-4d88-8388-f3686ac01c95/25183907467.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/47729235495.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/atlanta_apparel_mart_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381590d2-68d9-46a0-b9ef-6c605770094d/bawokupizife.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/34258544345.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_off00006e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9B 5396 bytes
SHA-256: 98b4513fb3a4a63f9e586c123feb8c8da4abbdff8d76cd409997d6dff26cf7fb
font_01_sfnt_off00008105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8105 10612 bytes
SHA-256: bb9af2682b41423c37d16308f2dc7752241039bc2362d69f972299ef36128d49