Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d57764a9e0c417…

MALICIOUS

PDF

54.8 KB Created: 2020-10-05 13:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 097dc2a55f5e223bc7836407270062b4 SHA-1: 985d7ed6b4b0b7ab0b3fc41d37e4568fa1e8913c SHA-256: e8d57764a9e0c417e4e4a22053bba3c7866dce3e6062c9c00f7313b99e134ecc
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=chinese+olympic+weightlifting+book In PDF document text
    • http://files.gethilineinsurance.com/uploads/1/3/1/6/131607269/8187401.pdfIn PDF document text
    • http://widufegom.carneysbltavern.com/uploads/1/3/2/7/132740649/nirebakipeta.pdfIn PDF document text
    • http://gifapafux.routesandboots.com/uploads/1/3/0/8/130813988/vaxetudiru_mobixude_zoveluvalulawe.pdfIn PDF document text
    • https://site-1036699.mozfiles.com/files/1036699/vusatipoxiref.pdfIn PDF document text
    • https://site-1037111.mozfiles.com/files/1037111/69241228331.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/6425/2584/files/ping_pong_table_tennis_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8360/3863/files/79231040864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/jafanazodutuwijixosige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4093/0983/files/agtalk_making_your_own_tracker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/4793495947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ce8a6f-1680-45b9-8f38-6ae2dd5c17ff/kopufalapenawefutatis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f611d4a1-cbec-4b3c-9742-5d94d52b6b1e/nogudebawus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce4970f-857a-44e2-932b-0d352f70f0c8/34819444143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdcc599d-e943-4fd2-941a-730559d1614e/donuxen.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6558 5424 bytes
SHA-256: 9f868632e8b2798fe80b4d29698f1a9ac03c86c97104d2e5f38e6650d6b5d0d5
font_01_sfnt_off000077c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C2 6372 bytes
SHA-256: dead03e4350ba41eb01b1b1df8ad1663c2f3d1049e8132d5a9aa08a4065767cf
font_02_sfnt_off00008656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8656 15612 bytes
SHA-256: 2ca5639f4537cdbe87d4cf2e7747ea47a06d724fee64149a7f5dcc4b38ad414e
font_03_sfnt_off0000b724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB724 16396 bytes
SHA-256: 7b1b3bf1e370e013263dd8decb4c04d141cb6a20cb83150cd82712e1af1baf4a

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