Malicious PDF — malware analysis report

Static analysis result for SHA-256 de87165d3e9db93b…

MALICIOUS

PDF

31.9 KB Created: 2020-11-04 18:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 538bf223795daecf1da83cfb50f6aa24 SHA-1: 43720bc1447e7fa6dd93d940f01a8bc7b615e2be SHA-256: de87165d3e9db93b71cf4f7ee27ac6cfa31efe28f5aa042d944cbba972ae0b53
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/123?keyword=justin+bieber+pop+funko In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5f9bdb8f7b466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446494/normal_5f9d1d519d49e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_5fa031bd5cdfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_5f92297668dd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f8e4025d65de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425009/normal_5f99281b2f139.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/76dae0ea-15be-4cca-8f5a-8bf78bfccc1e/nudowezevexovawer.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/setegovikasara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa40d25-1d9c-4a62-b40c-eb16c5810b19/dopatibelide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80df703e-c713-46aa-9b86-77b04cb1bb86/dukumemutijuparupurun.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_off00003eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3EAF 4848 bytes
SHA-256: 464a3e9fa7f3b6fff0daf3000897a88ae6da4d92a0643133a8e6c4307ebd09e2
font_01_sfnt_off00004f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3B 10892 bytes
SHA-256: 0f7979f8e052bc38c831439163e903e68ed7aa259cb95f4a0f251e0709f5873d

Open this report in the interactive analyzer, or submit your own file for analysis.