Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2008b28aefee2ac…

MALICIOUS

PDF

38.6 KB Created: 2020-04-10 01:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: afd18f1e6dce218d794e98af6c1de5dd SHA-1: adb4e77cc519dc07df9dfa136d2fe32cc53ff876 SHA-256: b2008b28aefee2ac608aac0a6d64c0047652dc86c5094207d76916344a6cd97f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains numerous embedded links to external websites, many of which are structured as numeric slugs, indicative of a link farm or SEO abuse. The document body, though partially corrupted, contains text suggesting it is a 'Possessive pronouns worksheet', a common lure for educational or administrative documents. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple unknown external URLs supports the conclusion that this document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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
  • 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://bridgethelena.com/uploads/1/3/1/4/131453170/131453170.html#possessive+pronouns+worksheet
    • http://yourvirtualbestfriend.com/uploads/1/3/1/4/131483275/sibagakunazi.pdf
    • http://laureneg.com/uploads/1/3/1/1/131163492/gusirid.pdf
    • http://thebourboncountrypotteryco.net/uploads/1/3/0/2/130273987/pumutisajelufew.pdf
    • http://triplecitiesvbc.com/uploads/1/3/0/3/130323103/5190152.pdf
    • http://ensuringqualitycare.org/uploads/1/3/0/5/130547659/57365.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_off00006cda.bin
f878fd11c7e4e2f190947c9bd576b750a2e70b10e37090a6deae3c1ed2fbad07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDA 8624 bytes

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