Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a101274f44ab7ce…

MALICIOUS

PDF

13.5 KB Created: 2019-04-30 05:13:36 +01:00 Authoring application: mPDF 5.7
MD5: f34f41036cd0252872d93259d1da1714 SHA-1: 8a996aaa26cbb3c8d469d27911f0f5fc76b4b579 SHA-256: 7a101274f44ab7ce51db22155957a6bd598ec10b2f95fa5f8bb6c051917d304c
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 behavior is indicative of a link farm or SEO poisoning tactic, designed to drive traffic to potentially malicious or unwanted content. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to exploit search engine rankings or user curiosity. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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/5098090098092/How-to-Freedive-A-beginners-guide-to-apnea-diving-How-to-reach-100-feet-on-one-breath-A-guide-to-the-art-and-science-of-breath-hold-freediving-by-Eduardo-Marchese.pdf
    • http://loaminoo.linkpc.net/1097093098094094/Eternal-Breath-of-Darkness-Breath-of-Darkness-1-by-Candice-Stauffer.pdf
    • http://loaminoo.linkpc.net/1097097092091092/Stealing-Breath-Stealing-Breath-1-by-Joanne-Brothwell.pdf
    • http://loaminoo.linkpc.net/6094091094091/Blueback-by-Tim-Winton.pdf
    • http://loaminoo.linkpc.net/5093091099096/Cloudstreet-by-Tim-Winton.pdf
    • http://loaminoo.linkpc.net/1099091098090090/Minimum-of-Two-by-Tim-Winton.pdf
    • http://loaminoo.linkpc.net/3095090094095098/The-Riders-by-Tim-Winton.pdf
    • http://loaminoo.linkpc.net/6093093092095/Cloudstreet-by-Tim-Winton.pdf
    • http://loaminoo.linkpc.net/1090092092092096/The-Turning-by-Tim-Winton.pdf
    • http://loaminoo.linkpc.net/2099097090093098/Beyond-Nostalgia-by-Tom-Winton.pdf
    • http://loaminoo.linkpc.net/9093095095099/The-Last-American-Martyr-by-Tom-Winton.pdf
    • http://loaminoo.linkpc.net/1099091097096093/In-the-Winter-Dark-by-Tim-Winton.pdf
    • http://loaminoo.linkpc.net/8096094094095090/Schwindel-Roman-by-Tim-Winton.pdf
    • http://loaminoo.linkpc.net/5092090092090093/An-Open-Swimmer-by-Tim-Winton.pdf
    • http://loaminoo.linkpc.net/8096090091093094/Das-Haus-an-der-Cloudstreet-by-Tim-Winton.pdf
    • http://loaminoo.linkpc.net/3092092096093098/Land-s-Edge-by-Tim-Winton.pdf
    • http://loaminoo.linkpc.net/3095098090091/Dirt-Music-by-Tim-Winton.pdf
    • http://loaminoo.linkpc.net/1090098095097095/The-Golden-Horn-by-June-Winton.pdf
    • http://loaminoo.linkpc.net/3091091098096090/The-Stolen-Christmas-by-June-Winton.pdf
    • http://loaminoo.linkpc.net/4098091090090095/Journey-Into-Darkness-by-Winton-Higgins.pdf

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