Malicious PDF — malware analysis report

Static analysis result for SHA-256 796bcdcb59cda053…

MALICIOUS

PDF

14.3 KB Created: 2019-05-02 01:53:05 +01:00 Authoring application: mPDF 5.7
MD5: ff93b0a2350b0c91f490cd9279e592d3 SHA-1: b405f2a7ece1f94a60399b074f49d7b0bf8dae9d SHA-256: 796bcdcb59cda0536d40ab57956b89eda33d3f32c9117ce3cd5632a853fd969c
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files hosted on a dynamic DNS domain. This pattern is indicative of SEO poisoning or a link farm designed to redirect users to potentially malicious content. While no scripts were directly extracted, the heuristic firings strongly suggest malicious intent through the mass distribution of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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/1099095097091092/The-Summer-Marked-The-Winter-People-2-by-Rebekah-L-Purdy.pdf
    • http://loaminoo.linkpc.net/2095099098091090/The-Summer-Marked-The-Winter-People-2-by-Rebekah-L-Purdy.pdf
    • http://loaminoo.linkpc.net/3099098092097097/The-Winter-People-The-Winter-People-1-by-Rebekah-L-Purdy.pdf
    • http://loaminoo.linkpc.net/1097099098097092/The-Winter-People-The-Winter-People-1-by-Rebekah-L-Purdy.pdf
    • http://loaminoo.linkpc.net/1098090093091096/The-Romeo-Club-by-Rebekah-L-Purdy.pdf
    • http://loaminoo.linkpc.net/4095091099092092/Daisy-and-the-Front-Man-Backstage-Pass-3-by-Rebekah-L-Purdy.pdf
    • http://loaminoo.linkpc.net/2097096095098091/Winter-s-End-by-Rebekah-Lyn.pdf
    • http://loaminoo.linkpc.net/4099094099092091/Winter-s-End-Seasons-of-Faith-2-by-Rebekah-Lyn.pdf
    • http://loaminoo.linkpc.net/2095095099091097/The-Door-Marked-Summer-by-Michael-Bentine.pdf
    • http://loaminoo.linkpc.net/3096095096098094/The-Winter-Oak-Summer-Country-2-by-James-A-Hetley.pdf
    • http://loaminoo.linkpc.net/3093098098099098/Summer-Lessons-Winter-Ball-2-by-Amy-Lane.pdf
    • http://loaminoo.linkpc.net/7097098096095/The-Winter-People-by-Phyllis-A-Whitney.pdf
    • http://loaminoo.linkpc.net/6092092096092094/Plays-2-A-Summer-s-Day-Dream-of-Autumn-Winter-by-Jon-Fosse.pdf
    • http://loaminoo.linkpc.net/6099092094095090/Winter-Notes-on-Summer-Impressions-by-Fyodor-Dostoyevsky.pdf
    • http://loaminoo.linkpc.net/3092090096092093/Division-of-the-Marked-The-Marked-1-by-March-McCarron.pdf
    • http://loaminoo.linkpc.net/6095099096090095/Night-Shadows-A-Rebekah-McCabe-Mystery-Rebekah-McCabe-Mysteries-Book-1-by-Bill-Craig.pdf
    • http://loaminoo.linkpc.net/3093096098099090/Summer-People-by-Aaron-Stander.pdf
    • http://loaminoo.linkpc.net/1093098096096099/Summer-Dreams-Winter-Love-by-Mary-Francis-Shura.pdf
    • http://loaminoo.linkpc.net/4093097094097091/Brilliant-Dark-Summer-Snow-Winter-Sun-2-by-Heather-Leigh.pdf
    • http://loaminoo.linkpc.net/6096094096098/Marked-Men-Series-Marked-Men-1-6-by-Jay-Crownover.pdf

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