Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa2ba147b1f51ef…

MALICIOUS

PDF

58.0 KB Created: 2020-09-29 22:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a86d8bd3ac0cbe49d90cb033d53116a5 SHA-1: d9351b5c789d10df51112e1f9251b66149afa63a SHA-256: 6aa2ba147b1f51efc9909ed1a62cffa7dda94cb8cb62c237113d32927eb14763
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://gettraff.ru/strik?keyword=learn+autocad+2007+pdf In PDF document text
    • http://files.mariemanski.com/uploads/1/3/1/4/131437849/1484160.pdfIn PDF document text
    • http://simojesab.stwtalent.com/uploads/1/3/0/7/130776644/wavevigazanar-vunogeponuwelat-voleduwemuko-nosiku.pdfIn PDF document text
    • http://files.lifebalanceyoga.net/uploads/1/3/2/7/132740278/7956544.pdfIn PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/bukul.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/disuwiw.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/2d8fc9d9-3715-49e8-9cb3-83da46ce7250/64996503594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/212acb38-8ff9-435c-a261-3f627334a4d3/romujonagiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed7eaa05-da4c-489b-bb6f-5d4063559f96/22318053021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2f6837-933c-4b33-8b03-80d93bc3ed26/13249234822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/920fdc5f-5ee8-485a-98b4-34636a403eb0/86806398616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2daa65f0-baa6-42d5-9cca-953bac01d8cf/18460794893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dc98c3f-753f-4bf4-abdd-c4b6397baaac/mekuxopusuzejozivuvo.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_off0000a3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D8 5232 bytes
SHA-256: 4a99b107649f5897f6b4c6eaed892721892a2fba39fd101056d94d84e8d1eb33
font_01_sfnt_off0000b5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5BE 10916 bytes
SHA-256: d6c86b21bfd2c66660732715aeed7e6f93c38857820bd4ff7f450b7e5634ca46

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