Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a18bafc100f346…

MALICIOUS

PDF

31.0 KB Created: 2020-05-27 09:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aae36c69b0bd924340f714ddc787ccb6 SHA-1: 02ac4bd676b9c429d55d8cce3ad5282872986e6f SHA-256: 03a18bafc100f34649ce82c965a004218d5c5113b2787390f5331f43a96a4c67
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to domains that appear to be part of a link farm designed to host malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to disguise malicious links as legitimate resources. While no scripts were directly extracted, the presence of embedded URLs and the heuristic firing for a 'PDF_SEO_LINK_FARM' indicate a likely intent to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

Heuristics 4

  • 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.
  • 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 http://ritualshairstudio.com/uploads/1/3/0/5/130550763/130550763.html#kpss+t%25C3%25BCrkiye+geneli+deneme
    • http://guidotrivellini.net/uploads/1/3/1/4/131452938/375832.pdf
    • http://bestiso9001.org/uploads/1/3/1/4/131407632/146d9b1ae3.pdf
    • http://saradepp.com/uploads/1/3/1/3/131379759/bb70746.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cfd.bin
7b4ffa4eea19e87cbfa45135dd2105b286384e99491102ed3b7dad57d8634dde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CFD 11292 bytes

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