Malicious PDF — malware analysis report

Static analysis result for SHA-256 db16a873992c5630…

MALICIOUS

PDF

20.2 KB Created: 2019-05-02 00:17:14 +01:00 Authoring application: mPDF 5.7
MD5: a1f38bf0a8915c34bdf3407dd2dba915 SHA-1: 428aef8feb183b0ff4a0cf9db7155e0cb54976e0 SHA-256: db16a873992c563012464c182a342c1ce1e977f44151eb78db11904be3c5abe8
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier as malicious and contains a large number of embedded links to external PDF files. The heuristic PDF_SEO_LINK_FARM indicates a link farm strategy, suggesting the primary purpose is to distribute content or drive traffic through these numerous links. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

Heuristics 2

  • 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.
  • 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://loaminoo.linkpc.net/1090093095097092097/Online-Help-Systems-Design-and-Implementation-by-Greg-Kearsley.pdf
    • http://loaminoo.linkpc.net/1090096090093098095/Intelligent-Tutoring-Systems-in-E-Learning-Environments-Design-Implementation-and-Evaluation-by-Vlado-Glavinic.pdf
    • http://loaminoo.linkpc.net/6093096093090091/Intelligent-Tutoring-Systems-in-E-Learning-Environments-Design-Implementation-and-Evaluation-by-Slavomir-Stankov.pdf
    • http://loaminoo.linkpc.net/1090093095097092098/Public-Access-Systems-Bringing-Computer-Power-to-the-People-by-Greg-Kearsley.pdf
    • http://loaminoo.linkpc.net/1090093095097092099/Public-Access-Systems-Bringing-Computer-Power-to-the-People-by-Greg-Kearsley.pdf
    • http://loaminoo.linkpc.net/1090093095098099094/Authoring-A-Guide-To-The-Design-Of-Interactive-Lessons-And-Programs-by-Greg-Kearsley.pdf
    • http://loaminoo.linkpc.net/1090098091092094098/Complex-Systems-Design-amp-Management-Proceedings-of-the-Sixth-International-Conference-on-Complex-Systems-Design-amp-Management-CSD-amp-M-2015-by-Gerard-Auvray.pdf
    • http://loaminoo.linkpc.net/1090098091093093096/Complex-Systems-Design-amp-Management-Proceedings-of-the-Fifth-International-Conference-on-Complex-Systems-Design-amp-Management-CSD-amp-M-2014-by-Frederic-Boulanger.pdf
    • http://loaminoo.linkpc.net/1090093095098098096/We-Teach-with-Technology-New-Visions-for-Education-by-Greg-Kearsley.pdf
    • http://loaminoo.linkpc.net/1090093095097092090/Educational-Technology-Leadership-Perspectives-by-Greg-Kearsley.pdf
    • http://loaminoo.linkpc.net/1090093095097092095/Computers-for-Educational-Administrators-Leadership-in-the-Information-Age-by-Greg-Kearsley.pdf
    • http://loaminoo.linkpc.net/5098098092095096/Electronic-Design-Circuits-and-Systems-by-C-J-Savant.pdf
    • http://loaminoo.linkpc.net/1090093095097095096/Systems-Analysis-and-Design-by-Elias-M-Awad.pdf
    • http://loaminoo.linkpc.net/5099094099095096/Operating-Systems-Concepts-and-Design-by-Milan-Milenkovic.pdf
    • http://loaminoo.linkpc.net/5099094098094097/Distributed-Systems-Concepts-and-Design-by-George-Coulouris.pdf
    • http://loaminoo.linkpc.net/9097098096094099/MATLAB-Simulations-for-Radar-Systems-Design-by-Bassem-R-Mahafza.pdf
    • http://loaminoo.linkpc.net/7092092091099099/Healthcare-Performance-Measurement-Systems-Design-and-Evaluation-by-Vahe-A-Kazandjian.pdf
    • http://loaminoo.linkpc.net/1090098093095094095/Multiagent-Systems-for-Manufacturing-Control-A-Design-Methodology-by-Stefan-Bussmann.pdf
    • http://loaminoo.linkpc.net/7099091091094094/Co-design-Approaches-to-Dependable-Networked-Control-Systems-by-Daniel-Simon.pdf
    • http://loaminoo.linkpc.net/1090093095097098094/Kearsley-s-Traveller-s-Entertaining-Guide-Through-Great-Britain-1801-by-G-Kearsley.pdf
    • http://loaminoo.linkpc.net/1090093095097092099/Public-Access-Systems-Bringing-C