Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac372debf2309d5c…

MALICIOUS

PDF

41.4 KB Created: 2020-11-09 04:36:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 1d6c70d212b669c8faee382cecb6ef01 SHA-1: c4b18dc83e4f66aadde3b630439fe9a1cc114c05 SHA-256: ac372debf2309d5c628990eb3f7a42273ff493ede09e4444764ab2ec123f0826
164 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://traffking.ru/aws?keyword=showbox+pc+apk+windows In PDF document text
    • https://fabodafulunulof.weebly.com/uploads/1/3/4/3/134372089/pevuwevudimob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f874be646a8f.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/8ab32ff248.pdfIn PDF document text
    • https://dupasaku.weebly.com/uploads/1/3/4/2/134235895/talafe-nonitojagomib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_5f9692a469449.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/d0381631f5165.pdfIn PDF document text
    • https://mupoveno.weebly.com/uploads/1/3/4/3/134371030/434fe1d.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/doxupozikodowe-gebosedu-desamomat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lodumuwenuw.files.wordpress.com/2020/11/17482723627.pdfIn PDF document text
    • https://s3.amazonaws.com/vopadofugon/zutoxadup.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/95296406844.pdfIn PDF document text
    • https://s3.amazonaws.com/faserubafa/zatotugenepal.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_off00006294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6294 5500 bytes
SHA-256: c0b7d6449f49a162bd7e08ca050f681c7c63d76eb19483efae66d42b5d7f8447
font_01_sfnt_off00007558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7558 10580 bytes
SHA-256: 86ac62bfe185aa685db4ce81b1003d0e7a5ecb9a7d36bf40ab15108604815a0e