Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3a872e58ddaf27…

MALICIOUS

PDF

17.1 KB Created: 2019-05-02 17:27:29 +01:00 Authoring application: mPDF 5.7
MD5: cc3f30af2555fa19cd437d98498ac0e5 SHA-1: df263232cd8718e1929f59b21a637b526d031ffc SHA-256: 9d3a872e58ddaf27f43f459505dba2ee57380aa150ce83ae208de6279d96ca7a
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of embedded external links, a technique often used for SEO manipulation or to distribute malware. While the document body is heavily corrupted, the presence of numerous links to external PDF files hosted on 'loaminoo.linkpc.net' strongly suggests a link farm or redirection scheme. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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/9099095090099095/Economics-of-Efficiency-by-Norris-A-Brisco.pdf
    • http://loaminoo.linkpc.net/9099095090093091/Economics-of-Business-by-Norris-a-Brisco.pdf
    • http://loaminoo.linkpc.net/9099095091090093/The-Economic-Policy-of-Robert-Walpole-by-Norris-Arthur-Brisco.pdf
    • http://loaminoo.linkpc.net/9099094098096092/BRISCO-The-Life-and-Times-of-National-Collegiate-and-World-Heavyweight-Wrestling-Champion-JACK-BRISCO-by-Jack-Brisco.pdf
    • http://loaminoo.linkpc.net/6093098093098096/Introduction-to-Statistics-with-SPSS-for-Social-Science-Gareth-Norris-Et-Al-by-Gareth-Norris.pdf
    • http://loaminoo.linkpc.net/4090093093095093/Economics-in-One-Lesson-The-Shortest-and-Surest-Way-to-Understand-Basic-Economics-by-Henry-Hazlitt.pdf
    • http://loaminoo.linkpc.net/9099094098096097/Cheryl-Brisco-s-Book-of-Confidence-by-Cheryl-Brisco.pdf
    • http://loaminoo.linkpc.net/1091097096090090099/Tax-Law-and-Policy-Beyond-Economic-Efficiency-by-David-A-Brennen.pdf
    • http://loaminoo.linkpc.net/3096099095095093/The-One-Best-Way-Frederick-Winslow-Taylor-and-the-Enigma-of-Efficiency-by-Robert-Kanigel.pdf
    • http://loaminoo.linkpc.net/1090095099090092096/Performance-and-Efficiency-Test-of-a-Harrington-Chain-Grate-Stoker-by-R-Regensburger.pdf
    • http://loaminoo.linkpc.net/7091092093092095/Promoting-Energy-Efficiency-And-Renewable-Energy-Gef-Cliamte-Change-Projects-And-Impacts-by-Eric-Martinot.pdf
    • http://loaminoo.linkpc.net/9099095090099094/Run-And-Tell-That-by-Karen-Brisco.pdf
    • http://loaminoo.linkpc.net/9099095092096090/The-Day-Marcus-Got-a-Dog-by-Dianna-L-Brisco.pdf
    • http://loaminoo.linkpc.net/9099095090092094/Whateva-by-Sharon-Brisco.pdf
    • http://loaminoo.linkpc.net/9099095090093097/The-Carnival-Mystery-by-Pat-A-Brisco.pdf
    • http://loaminoo.linkpc.net/9099094099093092/The-Campus-Mystery-by-Pat-A-Brisco.pdf
    • http://loaminoo.linkpc.net/9099095090093099/Merry-s-Treasure-by-Patty-Brisco.pdf
    • http://loaminoo.linkpc.net/9099095090094092/Mental-Marriage-by-Sharon-Brisco.pdf
    • http://loaminoo.linkpc.net/9099095090098096/Metamorphoses-Stories-She-May-Tell-by-Margaret-Brisco.pdf
    • http://loaminoo.linkpc.net/9099095090099097/Women-in-Transition-by-Margaret-Brisco.pdf
    • http://loaminoo.linkpc.net/10

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