Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5e10e26a0fd64e…

MALICIOUS

PDF

30.9 KB Created: 2020-04-06 12:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2f47698adf748c460416439501e2ba71 SHA-1: 55aada58b0db9b693119d216bf8b002dca2e3aaf SHA-256: db5e10e26a0fd64ec5cd005c16717a2fa0cf7d30063fa051fe1bf6431ebdf10e
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, contains fragments of URLs and text that suggest a link farm or redirection mechanism. The ML_NYX_PDF_MALICIOUS heuristic strongly indicates malicious intent. The primary attack pattern appears to be the creation of a link farm, potentially for SEO manipulation or to serve as a distribution point for further malicious content hosted on the linked domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://yourchairmansclub.us/uploads/1/3/0/9/130969277/130969277.html#secuencia+de+imagenes+para+contar+historias
    • http://unedenreepourgagner.com/uploads/1/3/0/4/130488395/ripikugaf.pdf
    • http://leadhvac.net/uploads/1/3/0/5/130544746/dewomazobi.pdf
    • http://creativpastime.com/uploads/1/3/0/6/130604188/8044962.pdf
    • http://ndbc-shanghai.com/uploads/1/3/0/4/130477420/9b7e4d.pdf
    • http://rustyhawkdesign.com/uploads/1/3/0/9/130968993/tiriperidigebe-zokawunikiku.pdf
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e01.bin
75c929ce40c8bc40150a62f2dc43549389757e6c4aec293583e34b48fefad728		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E01 8544 bytes

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