Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c27c193439bb690…

MALICIOUS

PDF

63.9 KB Created: 2021-01-21 18:19:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 70c3333ee872ba807cd2996a59e2e6ba SHA-1: ffda285347804439e608381e64583afb61d3d82f SHA-256: 3c27c193439bb690a8e07faee6bc9eac1a15d85d53c472c00fd544dc21582fce
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded URLs that redirect to external websites, including one that appears to be a link farm. The ML classifier strongly indicates maliciousness, and the presence of multiple external links suggests an attempt to redirect the user to a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/wb?keyword=3d%20pool%20ball%20cheats PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450514/normal_5ff58577712fb.pdfIn PDF document text
    • https://topuzuxet.weebly.com/uploads/1/3/0/7/130739133/lukofigufenopako.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/eJ3Gzgh/among_us_impostor_controls.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479435/normal_5fe4a4d40fc51.pdfIn PDF document text
    • http://sozetil.66ghz.com/fugoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/gidfib2/jiwulitifi.pdfIn PDF document text
    • https://butemupow.weebly.com/uploads/1/3/5/3/135338881/1180396.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/hbugdif/fuwubatawiwujawoni.pdfIn PDF document text
    • http://palifagumelu.22web.org/9299852109.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xojaxalevigob.epizy.com/bukasetowejixorowewu.pdfIn PDF document text
    • http://rusakarazixano.epizy.com/aace_dyslipidemia_guidelines_2017_ppt.pdfIn PDF document text
    • http://vezuzatutuxi.epizy.com/jogujubinawula.pdfIn PDF document text
    • http://sudemididesiz.epizy.com/ubah_file_ke_word_online.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_off0000bd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9B 5276 bytes
SHA-256: 32e23860ca1a5f010e293191192e4555e628893d3a1e9b5dedffab61e3fc7a7b
font_01_sfnt_off0000cf7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7C 10528 bytes
SHA-256: 2a1c25ec7629695145ae0a9fb0060bf0de4e0950bd900e63243b2113a3c44292

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