Malicious PDF — malware analysis report

Static analysis result for SHA-256 e890c6809bc78cc9…

MALICIOUS

PDF

49.5 KB Created: 2020-10-01 19:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 06aa91930be87fc8c2db4327c296b5c5 SHA-1: 32244b323781f637e90f48563faf21a2d96d1a76 SHA-256: e890c6809bc78cc9fae9f59220e101d8e83a23203e5ca1d91518df670c810757
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/strik?keyword=sqlite+android+tutorial+pdf In PDF document text
    • http://files.narragansettsurveyors.org/uploads/1/3/1/8/131856009/6289016.pdfIn PDF document text
    • http://files.en.softiehk.com/uploads/1/3/0/7/130739285/davonoba.pdfIn PDF document text
    • http://gelujove.liladala.com/uploads/1/3/1/8/131856439/nelatesilofolorop.pdfIn PDF document text
    • http://xerarejo.internationalschoolhealth.org/uploads/1/3/1/4/131453197/vogilozomowomik-liwanidosadedal-zemidowa.pdfIn PDF document text
    • https://site-1037077.mozfiles.com/files/1037077/foruzokowelojixejuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0402d0e8-a360-495e-834f-eed67a09535a/41332051635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f1daae-0ee6-4328-a30e-a2e49fe0e5f1/rawused.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3795cc-c19f-4213-9214-61e0c34083a2/71585447042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7f4098-6d36-4f18-b7e9-d16c6bbd5ece/12982635282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7de993a-9415-44c7-ad65-75a558d3cc7c/27856906809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8dffa3a-a385-4439-a22e-d13820be9f9c/66980556574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd9ec54-eaf6-4025-b9f8-e19c68a80112/rezisufasobuwifokaguwil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/387e4a7f-4927-4756-8000-95303bca2877/jimakuxogurumade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a160a1-0b32-44ec-9555-bebc4f17a931/taluseweso.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000769f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x769F 5084 bytes
SHA-256: e43320abe976851c3c766654f3d0c7cb3263fae6fa812b6a84115f6a2bf1d8b0
font_01_sfnt_off000087fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87FB 15924 bytes
SHA-256: c22e7bf8dd00f1f1a0bd4cb4558c94a57b28d886347d9a49630e998dc0c25b20

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