Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc7faf887131897…

MALICIOUS

PDF

46.0 KB Created: 2020-10-05 14:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 62f100291df9d6dedbb055bb4cd26a63 SHA-1: fa74d8f123eb0b07ef710b231b8f2b1a91d39c46 SHA-256: dbc7faf88713189786603c37b3b18cb64187b07116b020e21598a1568be3c879
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/strik?keyword=diversidad+cultural+de+guatemala+pdf In PDF document text
    • https://site-1037085.mozfiles.com/files/1037085/jijotebotufekupabezisot.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/80014458166.pdfIn PDF document text
    • https://site-1037911.mozfiles.com/files/1037911/35051669937.pdfIn PDF document text
    • https://site-1043970.mozfiles.com/files/1043970/1377076277.pdfIn PDF document text
    • https://site-1038776.mozfiles.com/files/1038776/zagapusokazefuxurikazidu.pdfIn PDF document text
    • http://lejigugeg.circamodern.net/uploads/1/3/0/9/130969656/dofixulujekarepojag.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/nirapuwuwusupego.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/jerabidajosalo.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/xafoxazulikuvapurid.pdfIn PDF document text
    • https://site-1038363.mozfiles.com/files/1038363/taxifejimesamot.pdfIn PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/2651151491.pdfIn PDF document text
    • https://site-1036920.mozfiles.com/files/1036920/tefeteponikuxakenoxeba.pdfIn PDF document text
    • https://site-1039545.mozfiles.com/files/1039545/mepizenag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000647d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647D 5200 bytes
SHA-256: d5b7f8b369d97da5ad9557e02aa5b2f16a238351fde56de6a7919b4ce88034b3
font_01_sfnt_off00007642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7642 11288 bytes
SHA-256: 15505f44ba64e414d320ba41ec94608799fe77953dea0ead98b1276b161a91c2
font_02_sfnt_off00009acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ACB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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