Malicious PDF — malware analysis report

Static analysis result for SHA-256 58997213bd08ccce…

MALICIOUS

PDF

17.7 KB Created: 2019-05-03 05:07:42 +01:00 Authoring application: mPDF 5.7
MD5: 2b936d24fbf41ee54b5fffaad5b1ddce SHA-1: ac28a1df78d0877ec6ed3e63b3517f288db6074b SHA-256: 58997213bd08ccceea2dfdf1a7ea4a43299e2a3891823a6f413ce85792bd0efe
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents, a technique often used for SEO poisoning or to drive traffic to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. No scripts were extracted from this sample. The primary IOCs are the URLs pointing to the external PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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/3094099099095/Thirsting-for-Peace-in-a-Raging-Century-Selected-Poems-1961-85-Selected-Works-2-by-Ed-Sanders.pdf
    • http://loaminoo.linkpc.net/5090099099095090/How-the-Bicycle-Shone-New-amp-Selected-Poems-New-and-Selected-Poems-by-Gillian-Allnutt.pdf
    • http://loaminoo.linkpc.net/4095092098090098/Selected-Poems-Painting-Graphic-Works-by-Taras-Shevchenko.pdf
    • http://loaminoo.linkpc.net/5098097091090092/War-amp-Love-Love-amp-War-New-and-Selected-Poems-New-and-Selected-Poems-by-Aharon-Shabtai.pdf
    • http://loaminoo.linkpc.net/1090097093094095099/Hugo-Von-Hofmannsthal-Selected-Works-Volume-3-Selected-Plays-and-Libretti-by-Hugo-von-Hofmannsthal.pdf
    • http://loaminoo.linkpc.net/7095091091099093/Works-of-Voltaire-20-works-Candide-Zadig-Philosophical-Dictionary-selected-poetry-amp-more-by-Voltaire.pdf
    • http://loaminoo.linkpc.net/1090099090096/The-Selected-Works-of-T-S-Spivet-by-Reif-Larsen.pdf
    • http://loaminoo.linkpc.net/2098094097098097/The-Selected-Works-of-T-S-Spivet-by-Reif-Larsen.pdf
    • http://loaminoo.linkpc.net/6096091091097/The-Sea-Gypsies-Stay-New-and-Selected-Works-by-Rowena-T-Torrevillas.pdf
    • http://loaminoo.linkpc.net/1099096096098099/The-Selected-Poems-of-Tu-Fu-by-Du-Fu.pdf
    • http://loaminoo.linkpc.net/4094092096096090/Selected-Writings-Focused-on-Women-s-Equality-and-Peace-by-Alexandra-Kollontai.pdf
    • http://loaminoo.linkpc.net/7092093095097093/Major-Works-Selected-Philosophical-Writings-by-Ludwig-Wittgenstein.pdf
    • http://loaminoo.linkpc.net/1091092091096093090/Selected-Poems-by-D-H-Lawrence.pdf
    • http://loaminoo.linkpc.net/4095099091094093/Selected-Poems-by-Octavio-Paz.pdf
    • http://loaminoo.linkpc.net/2098099091093096/Selected-Poems-by-W-B-Yeats.pdf
    • http://loaminoo.linkpc.net/1099096096099094/The-Selected-Poems-by-Wang-Wei.pdf
    • http://loaminoo.linkpc.net/1090097099092/The-Best-of-It-New-and-Selected-Poems-by-Kay-Ryan.pdf
    • http://loaminoo.linkpc.net/3093094099090096/The-Three-Way-Tavern-Selected-Poems-by-Ko-Un.pdf
    • http://loaminoo.linkpc.net/9094090097093/Selected-Poems-by-W-H-Auden.pdf
    • http://loaminoo.linkpc.net/5091097092099097/Selected-Poems-by-Mary-Ruefle.pdf

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