Malicious PDF — malware analysis report

Static analysis result for SHA-256 488c55080d64b92a…

MALICIOUS

PDF

47.1 KB Created: 2020-10-08 18:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 11ef4fd0dd21f80fb9cb19c82b4b4b6a SHA-1: a867b8f77165cf14fd967ad1e919a7e61bd55d03 SHA-256: 488c55080d64b92a80dbc5b38309fb2a9d99a285a9ff7b66bf7c167584e27e0f
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://cctraff.ru/strik?keyword=agile+and+scrum+pdf In PDF document text
    • https://site-1043599.mozfiles.com/files/1043599/zejaweza.pdfIn PDF document text
    • https://site-1043414.mozfiles.com/files/1043414/mevit.pdfIn PDF document text
    • https://site-1039922.mozfiles.com/files/1039922/seretotizadijibona.pdfIn PDF document text
    • http://files.savisconsulting.com/uploads/1/3/1/4/131409574/1505320.pdfIn PDF document text
    • http://files.elitesandvolleyball.com/uploads/1/3/0/7/130739831/7411631.pdfIn PDF document text
    • http://files.stameliareled.com/uploads/1/3/2/6/132681342/67254904.pdfIn PDF document text
    • http://lajikukoz.avohrecovery.org/uploads/1/3/1/6/131606228/df4bb78a36c14c6.pdfIn PDF document text
    • http://files.intheskin.net/uploads/1/3/1/4/131405948/lulageno.pdfIn PDF document text
    • http://files.chandelierballroom.com/uploads/1/3/0/7/130739312/1326828.pdfIn PDF document text
    • http://files.madkettlefarm.com/uploads/1/3/0/7/130776151/b4d13e86eb.pdfIn PDF document text
    • http://files.partiesnpresents.com/uploads/1/3/0/7/130739510/mepasopabomavu_gokijafarini_pozawem.pdfIn PDF document text
    • http://files.406cavoodles.com/uploads/1/3/0/8/130874655/zilazokojixafa.pdfIn PDF document text
    • http://xolesife.redcouchreading.com/uploads/1/3/1/1/131163667/5e165aec.pdfIn PDF document text
    • http://belaxu.jessicastugelmayer.com/uploads/1/3/1/4/131411197/5648739.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000079fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79FA 5464 bytes
SHA-256: 235d0d07c6f88d4f1932b0594e777f06d391ad603766de0a3e9b7e43bb1863da
font_01_sfnt_off00008c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7F 10292 bytes
SHA-256: e24c54561f67e0be62db9e654d109d4e4131736730de3d8df1111edb51936013