Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d70e8e8294cdca…

MALICIOUS

PDF

18.8 KB Created: 2019-05-07 08:36:25 +01:00 Authoring application: mPDF 5.7
MD5: c647d3625967aaf2238b6d12c8b6c27e SHA-1: 523094c8b1d83bc4caa18d25e2a8289555795c50 SHA-256: 88d70e8e8294cdca8b0749815f9d0700b071dc0a9bc6f7a50de16bf4b1b34fcf
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While many of these links resolve to benign content, the sheer volume and the nature of the heuristic suggest a malicious intent, possibly for SEO manipulation or to distribute further malware. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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/6095094091/All-s-Faire-in-Middle-School-by-Victoria-Jamieson.pdf
    • http://loaminoo.linkpc.net/3099091098097095/Middle-School-How-I-Survived-Bullies-Broccoli-and-Snake-Hill-Middle-School-4-by-James-Patterson.pdf
    • http://loaminoo.linkpc.net/3094095092093091/Middle-School-My-Brother-Is-a-Big-Fat-Liar-Middle-School-3-by-James-Patterson.pdf
    • http://loaminoo.linkpc.net/9094099092091099/The-School-of-Shakspere-Histrio-Mastix-Or-the-Player-Whipt-the-Prodigal-Son-Jacke-Drums-Entertainment-a-Warning-for-Faire-Women-Faire-Em-the-Miller-s-Daughter-of-Manchester-an-Account-of-Robert-Greene-His-Life-and-Works-and-His-Attacks-on-Shaks-by-William-Shakespeare.pdf
    • http://loaminoo.linkpc.net/4091095/Roller-Girl-by-Victoria-Jamieson.pdf
    • http://loaminoo.linkpc.net/6094091093090/Middle-School-The-Worst-Years-of-My-Life-Midde-School-1-by-James-Patterson.pdf
    • http://loaminoo.linkpc.net/7090099090093093/The-Queen-of-the-Faire-Faire-Folk-Saga-7-by-Gillian-Summers.pdf
    • http://loaminoo.linkpc.net/7090099090092090/Faire-Diviner-The-Faire-Folk-3-by-Madeleine-Ribbon.pdf
    • http://loaminoo.linkpc.net/7090099090090093/Faire-Protector-The-Faire-Folk-2-by-Madeleine-Ribbon.pdf
    • http://loaminoo.linkpc.net/5099093097094/Planet-Middle-School-by-Nikki-Grimes.pdf
    • http://loaminoo.linkpc.net/8096094093098/How-to-Survive-Middle-School-by-Donna-Gephart.pdf
    • http://loaminoo.linkpc.net/8092094096090/Royal-Day-Out-From-the-Notebooks-of-a-Middle-School-Princess-1-5-by-Meg-Cabot.pdf
    • http://loaminoo.linkpc.net/3091099095099093/Silentious-Summit-Middle-School-2-by-Shannon-Freeman.pdf
    • http://loaminoo.linkpc.net/1093093095099098/Can-You-Get-An-F-In-Lunch-How-I-Survived-Middle-School-1-by-Nancy-E-Krulik.pdf
    • http://loaminoo.linkpc.net/1090097090098097/I-Funny-A-Middle-School-Story-by-James-Patterson.pdf
    • http://loaminoo.linkpc.net/2092097097093090/The-New-Girl-How-I-Survived-Middle-School-4-by-Nancy-E-Krulik.pdf
    • http://loaminoo.linkpc.net/2094094091090093/The-Contagious-Colors-of-Mumpley-Middle-School-by-Fowler-DeWitt.pdf
    • http://loaminoo.linkpc.net/5094093092098098/Middle-School-Nerd-Avengers-1-Rise-of-the-Nerds-by-M-P-Rolland.pdf
    • http://loaminoo.linkpc.net/9096099094093099/Zach-Ziegler-s-So-Called-Middle-School-Life-by-Will-Overby.pdf
    • http://loaminoo.linkpc.net/7096090093093098/Interactive-Notebook-for-Belle-Prater-s-Boy-by-Middle-School-Novel-Units.pdf

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