Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a471130a74f6216…

MALICIOUS

PDF

13.1 KB Created: 2019-04-30 04:01:55 +01:00 Authoring application: mPDF 5.7
MD5: c1cb7b74457b3d0ad4d5fcf4e4b36f1e SHA-1: a395892fc798d6c3b0b59895835ee5122b15b70e SHA-256: 8a471130a74f621603c11053aade09a3f739c023ba4292d159a469796c2caeb3
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. While the specific intent of the links is unclear due to their benign reputation, the overall structure and heuristic firings strongly suggest a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9006

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/1099096097097093/Threads-Threads-1-by-Sophia-Bennett.pdf
    • http://loaminoo.linkpc.net/9095095092093/Buried-Threads-Threads-2-by-Kaylin-McFarren.pdf
    • http://loaminoo.linkpc.net/3090091092097/Buried-Threads-Threads-2-by-Kaylin-McFarren.pdf
    • http://loaminoo.linkpc.net/2099099099099/Banished-Threads-Threads-3-by-Kaylin-McFarren.pdf
    • http://loaminoo.linkpc.net/1091095093095095098/Picking-Up-the-Threads-by-Ian-Strachan.pdf
    • http://loaminoo.linkpc.net/4097096094094098/Threads-of-Desire-by-K-M-Jackson.pdf
    • http://loaminoo.linkpc.net/3098095097098099/Threads-of-Treason-by-Mary-Bale.pdf
    • http://loaminoo.linkpc.net/6090098096095093/Wayward-Threads-by-Robert-Goldmann.pdf
    • http://loaminoo.linkpc.net/6099098094091093/Stray-Threads-by-Kenneth-Amidon.pdf
    • http://loaminoo.linkpc.net/6094091093097094/Threads-of-Reason-by-Mois-Navon.pdf
    • http://loaminoo.linkpc.net/1098096096091097/Book-of-Lost-Threads-by-Tess-Evans.pdf
    • http://loaminoo.linkpc.net/1091093093099097096/The-Lord-of-Lies-Strange-Threads-2-by-Sam-Bowring.pdf
    • http://loaminoo.linkpc.net/1095090097093096/Sewing-Can-Be-Dangerous-and-Other-Small-Threads-by-S-R-Mallery.pdf
    • http://loaminoo.linkpc.net/4094096099097091/The-Unraveling-The-Luminated-Threads-1-by-Laurel-Wanrow.pdf
    • http://loaminoo.linkpc.net/5097096092090091/Tightening-the-Threads-Mainely-Needlepoint-5-by-Lea-Wait.pdf
    • http://loaminoo.linkpc.net/1091096098091094098/The-Binding-The-Luminated-Threads-3-by-Laurel-Wanrow.pdf
    • http://loaminoo.linkpc.net/4093099096096097/Threads-of-Desire-Spellcraft-1-by-Eleri-Stone.pdf
    • http://loaminoo.linkpc.net/6090094090091096/Threads-of-Change-A-Quilting-Story-1-by-Jodi-Barrows.pdf
    • http://loaminoo.linkpc.net/1096092096097091/The-Legacy-Of-Lord-Regret-Strange-Threads-1-by-Sam-Bowring.pdf
    • http://loaminoo.linkpc.net/3097099098090/Tangled-Threads-Elemental-Assassin-4-by-Jennifer-Estep.pdf

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