Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d287f5de3163ce…

MALICIOUS

PDF

61.4 KB Created: 2020-09-30 13:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 840e11c830033f69eddc01d0ece1df3f SHA-1: f36f9d09bc7c4c1009c7b58ca3e4fdc857794428 SHA-256: d3d287f5de3163ce6772c8e13fb431eff87ca57a72d78c0a6c8487da9a055df8
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=asymptotes+pdf+in+hindi In PDF document text
    • http://files.prettylittlenurse.com/uploads/1/3/0/7/130775200/8658276ed7eb123.pdfIn PDF document text
    • http://files.atticsalt.org/uploads/1/3/1/8/131856769/getifijewovami.pdfIn PDF document text
    • http://files.maggiekingfreelance.com/uploads/1/3/0/9/130969154/baxikuzabilijo.pdfIn PDF document text
    • http://files.warrencoveconsulting.com/uploads/1/3/1/0/131071035/1f2decec05c.pdfIn PDF document text
    • http://rejusaji.martinezria.com/uploads/1/3/2/6/132682905/tafiwexuruj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb66ee60-2661-462d-bae6-b0ba47791cad/93368902666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a9a305-3df5-4d19-9313-00b2c37e27b9/zapadirapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f845e71e-13aa-4dbd-8e14-46071dae0e39/geworonazojikode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a750dc-e5d6-461a-a104-f3a23655531d/51936001066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e6d39cd-27e3-4d52-adf5-4b76cb50bd0a/67630601446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5180/9942/files/savojobapowufumuganovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/99948968329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9241/4369/files/how_to_block_people_on_spotify.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1390/2234/files/xowusumigofelase.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABF 5032 bytes
SHA-256: ef917cd91ee5d2877e41448f980aa899e0afd886b80a7091b4cbc98818673dd0
font_01_sfnt_off00007bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC6 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00008729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8729 10624 bytes
SHA-256: 2056a00082113b6bfc52903f2792b633a4de86a77082665b2be91724991cdae3
font_03_sfnt_off0000aacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAACD 16064 bytes
SHA-256: e475b127670123e0992d690554a82105660adb0ac795948380663d104441f777
font_04_sfnt_off0000bf99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF99 12140 bytes
SHA-256: 6309dde83cecfb959885e6d24a4d4278f558b87f3eaec2f0f1b193dfe84c8e61

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