Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec0af5ec56ee345…

MALICIOUS

PDF

13.4 KB Created: 2019-04-29 23:03:22 +01:00 Authoring application: mPDF 5.7
MD5: 812c573de4aa5e173cb0def67745fca4 SHA-1: b84ffafdfb50087a15af9a98d132de6f8656f99e SHA-256: 0ec0af5ec56ee345f94bb6bbbe46e2cfbb23db107bbd9989536ce91ff5b2bbce
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which are structured as numeric slugs followed by book titles, suggesting a link farm for SEO manipulation or to host potentially malicious content. The ML classifier also flagged this PDF as malicious. While the URLs themselves are marked as benign, the sheer volume and structure indicate a suspicious pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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/1098092092092094/The-Second-Sign-The-Second-Sign-1-by-Elizabeth-Arroyo.pdf
    • http://loaminoo.linkpc.net/1091092090097090091/The-Sign-of-Four-by-Delta-Systems-Co-Inc.pdf
    • http://loaminoo.linkpc.net/5093095093093/The-Sign-by-Raymond-Khoury.pdf
    • http://loaminoo.linkpc.net/6096096098094092/Lestrade-and-the-Sign-of-Nine-by-M-J-Trow.pdf
    • http://loaminoo.linkpc.net/1090096095093099/So-the-Sign-Said-by-Natasha-Osteen.pdf
    • http://loaminoo.linkpc.net/5092095090098096/The-Sign-of-Jonas-by-Thomas-Merton.pdf
    • http://loaminoo.linkpc.net/1090092098092099/The-Sign-of-Four-by-Arthur-Conan-Doyle.pdf
    • http://loaminoo.linkpc.net/3092097091090090/At-the-Sign-of-the-Naked-Waiter-by-Amy-Herrick.pdf
    • http://loaminoo.linkpc.net/2091092096090091/Sign-of-the-Dove-by-Susan-Fletcher.pdf
    • http://loaminoo.linkpc.net/1091094096094091092/It-s-Happy-Bunny-What-s-Your-Sign-by-Jim-Benton.pdf
    • http://loaminoo.linkpc.net/8091097098099091/The-Plus-Sign-Anthology-by-Kathia-Iblis.pdf
    • http://loaminoo.linkpc.net/5091090094093093/The-Sign-of-Jonah-by-Charlie-Canning.pdf
    • http://loaminoo.linkpc.net/8095093090095098/The-Sign-of-the-Four-by-Arthur-Conan-Doyle.pdf
    • http://loaminoo.linkpc.net/2099097095091/Sign-of-the-Moon-by-Erin-Hunter.pdf
    • http://loaminoo.linkpc.net/7096092097095097/The-Sign-of-the-Four-by-Arthur-Conan-Doyle.pdf
    • http://loaminoo.linkpc.net/1099095093091099/Call-Sign-Karma-by-Jamie-Rae.pdf
    • http://loaminoo.linkpc.net/3093094094097098/The-Sign-for-Drowning-by-Rachel-Stolzman.pdf
    • http://loaminoo.linkpc.net/9096096092099/Sign-of-the-Green-Dragon-by-C-Lee-McKenzie.pdf
    • http://loaminoo.linkpc.net/6092092095098099/The-Sign-of-Four-by-Arthur-Conan-Doyle.pdf
    • http://loaminoo.linkpc.net/3094097099096091/The-Sign-of-Love-by-Revonah-Hill-Holloway.pdf

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