Malicious PDF — malware analysis report

Static analysis result for SHA-256 541661d51e1d12ff…

MALICIOUS

PDF

21.8 KB Created: 2019-05-01 06:31:03 +01:00 Authoring application: mPDF 5.7
MD5: d2de697cde0bed396552a4b0839b1228 SHA-1: a761ed9b9b48b2995c6b708f2f6ac90ed2cdee35 SHA-256: 541661d51e1d12ffb3cbd0d5914dd4114ab9c3b29646069bce1a724d378c4cfc
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. These links all point to the same domain, 'unieoooq.linkpc.net', and appear to be disguised as academic book titles. While the URLs themselves are currently marked as benign, the sheer volume and the nature of the heuristic firing strongly suggest a malicious intent, such as SEO manipulation or redirecting users to potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

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://unieoooq.linkpc.net/24e94e24e54e14e8/Linear-Algebra-and-Its-Applications-by-David-C-Lay.pdf
    • http://unieoooq.linkpc.net/14e14e44e84e54e74e7/First-Course-In-Linear-Algebra-by-Daniel-Zelinsky.pdf
    • http://unieoooq.linkpc.net/14e14e34e04e34e74e8/Transform-Linear-Algebra-by-Frank-Uhlig.pdf
    • http://unieoooq.linkpc.net/54e54e14e94e24e4/Introduction-to-Linear-Algebra-by-Marvin-Marcus.pdf
    • http://unieoooq.linkpc.net/94e34e84e84e74e8/Toeplitz-Matrices-Asymptotic-Linear-Algebra-And-Functional-Analysis-by-Albrecht-B-ttcher.pdf
    • http://unieoooq.linkpc.net/14e14e04e64e64e44e0/Algebra-and-Trigonometry-Functions-and-Applications-by-Paul-A-Foerster.pdf
    • http://unieoooq.linkpc.net/14e04e34e64e34e74e0/Applications-of-Geometric-Algebra-in-Computer-Science-and-Engineering-by-Leo-Dorst.pdf
    • http://unieoooq.linkpc.net/14e14e04e64e94e24e2/Algebra-1-Expressions-Equations-And-Applications-Teacher-s-Resource-Binder-by-Paul-A-Foerster.pdf
    • http://unieoooq.linkpc.net/74e34e94e14e64e7/Invitation-to-Linear-Operators-From-Matrices-to-Bounded-Linear-Operators-on-a-Hilbert-Space-by-Takayuki-Furuta.pdf
    • http://unieoooq.linkpc.net/84e34e74e24e44e9/Complex-Variables-with-Applications-by-David-A-Wunsch.pdf
    • http://unieoooq.linkpc.net/14e04e14e44e84e04e0/Automated-Deduction-A-Basis-for-Applications-Vol-3-Applications-Applied-Logic-Series-Foundations---Calculi-and-Methodss-v-1-by-Wolfgang-Bibel.pdf
    • http://unieoooq.linkpc.net/14e04e44e44e04e34e5/3D-Game-Engine-Architecture-Engineering-Real-Time-Applications-with-Wild-Magic-The-Morgan-Kaufmann-Series-in-Interactive-3d-Technology-by-David-H-Eberly.pdf
    • http://unieoooq.linkpc.net/14e24e24e84e54e2/Build-Web-Applications-with-Java-Learn-every-aspect-to-build-web-applications-from-scratch-by-Mirza-Yousuf-Ahmed-Baig.pdf
    • http://unieoooq.linkpc.net/14e14e94e04e34e74e3/Product-Release-Planning-Methods-Tools-and-Applications-Methodology-Tools-and-Applications-by-Guenther-Ruhe.pdf
    • http://unieoooq.linkpc.net/74e84e84e54e04e7/Lasers-and-Non-Linear-Optics-by-B-B-Laud.pdf
    • http://unieoooq.linkpc.net/74e14e94e14e04e8/Vasopressin-and-Oxytocin-From-Genes-to-Clinical-Applications-From-Genes-to-Clinical-Applications-by-Dominique-Poulain.pdf
    • http://unieoooq.linkpc.net/94e84e44e84e64e6/Linear-Programming-And-Related-Techniques-by-C-Van-De-Panne.pdf
    • http://unieoooq.linkpc.net/44e34e64e74e04e4/Linear-Shift-Part-1-by-Paul-B-Kohler.pdf
    • http://unieoooq.linkpc.net/14e14e64e94e04e44e3/Microbial-Linear-Plasmids-by-Friedhelm-Meinhardt.pdf
    • http://unieoooq.linkpc.net/94e84e44e94e44e4/Linear-Programming-and-Related-Techniques-by-C-Van-De-Panne.pdf
    • http://unieoooq.linkpc.net/74e34e94e14e64e7/Invitation-to-Linear-Operators-From-Matrices-to-Bou

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