Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9e41b6ae87ebaa…

MALICIOUS

PDF

43.1 KB Created: 2020-10-07 12:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e8f9c87e94779816a19f613af20a046b SHA-1: f16c40e370059bd70f53bb6c80202e44864c2def SHA-256: ad9e41b6ae87ebaa30fd2c387e0d1d3652f9bd6f86b81de82d157670cec5192a
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/strik?keyword=bd+chaurasia+pdf+8th+edition+download In PDF document text
    • https://site-1038439.mozfiles.com/files/1038439/83683819573.pdfIn PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/29918528510.pdfIn PDF document text
    • https://site-1040177.mozfiles.com/files/1040177/sezolujasalijalivag.pdfIn PDF document text
    • https://site-1039491.mozfiles.com/files/1039491/zipopilonilapebeduj.pdfIn PDF document text
    • https://site-1036826.mozfiles.com/files/1036826/50371460614.pdfIn PDF document text
    • http://files.crimershow.com/uploads/1/3/1/6/131607043/1711043.pdfIn PDF document text
    • http://xijogotam.msdewarsclass.com/uploads/1/3/1/4/131408170/sijokodov_lifax_devuzisija.pdfIn PDF document text
    • https://site-1037909.mozfiles.com/files/1037909/37505720119.pdfIn PDF document text
    • https://site-1039361.mozfiles.com/files/1039361/pibakepinemezoxav.pdfIn PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/jativoloj.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/jewifurujo.pdfIn PDF document text
    • https://site-1040223.mozfiles.com/files/1040223/21767656188.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/1c99c575-393d-4070-ade6-ab5c6be76f2b/94887384570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d0999d9-4c53-461d-ab79-80f34c1b3ab3/54054738239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd3bd2f-b9cc-4935-8825-085ba5228386/43944776112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00793221-6482-4ef6-9572-725585c72053/witisipazuxosoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ab2486-39e0-40f6-912a-83d0e7c47027/46599665702.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_off00006a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A32 5576 bytes
SHA-256: 198fd801e5c58a13f05d8d3a8766d744d44d0c507ee32b1cabae030a022232fe
font_01_sfnt_off00007d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D34 9988 bytes
SHA-256: bb9b0cfc3c1b49466aa39de103f9b35b7a860aeaea168eccbab22e6d55082b4d

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