Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7167bbc0dbb03bb…

MALICIOUS

PDF

21.0 KB Created: 2019-04-30 02:37:03 +01:00 Authoring application: mPDF 5.7
MD5: 1d78c6398ef9b3b6ebe3a72d50d2fca6 SHA-1: b7cdd88a34d9d840ae622fd2f9b5ecf4f80965c3 SHA-256: d7167bbc0dbb03bbc1e6e080198ef438c228cab14826ab1fe225ee507ba48952
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF documents hosted on a dynamic DNS domain. This technique is often used to distribute malicious content or to engage in SEO poisoning to drive traffic to malicious sites. While the ML classifier strongly indicated maliciousness, the specific payload or intent beyond linking is not clear from the static analysis. The embedded URLs are the primary IOCs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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/54e94e14e44e84e0/Gr-newald-The-Paintings-With-two-essays-by-J-K-Huysmans-and-a-catalogue-by-E-Ruhmer-by-Eberhard-Ruhmer.pdf
    • http://unieoooq.linkpc.net/14e04e14e54e94e24e0/Radium-Und-Andere-Radioaktive-Substanzen-Unter-Besonderer-Benutzung-Eines-Von-Elektro-Ingenieur-William-J-Hammer-New-York-VOR-Dem-American-Institute-of-Electrical-Engineers-Und-Der-American-Electrochemical-Society-Am-17-April-1903-Gehaltenen-Vortrage-by-Ernst-Ruhmer.pdf
    • http://unieoooq.linkpc.net/84e34e44e94e34e8/Paintings-of-Nicolas-Poussin-Critical-Catalogue-by-Anthony-Blunt.pdf
    • http://unieoooq.linkpc.net/54e24e34e14e84e3/Frederic-Remington-A-Catalogue-Raisonne-of-Paintings-Watercolors-and-Drawings-by-Peter-H-Hassrick.pdf
    • http://unieoooq.linkpc.net/54e94e14e44e34e8/The-Road-from-Decadence-From-Brothel-to-Cloister-Selected-Letters-of-J-K-Huysmans-by-Joris-Karl-Huysmans.pdf
    • http://unieoooq.linkpc.net/54e94e14e44e84e2/The-Genius-Of-The-Future-Essays-In-French-Art-Criticism-Diderot-Stendhal-Baudelaire-Zola-The-Brothers-Goncourt-Huysmans-by-Anita-Brookner.pdf
    • http://unieoooq.linkpc.net/54e94e14e44e34e7/The-Classic-Works-of-J--K-Huysmans-by-Joris-Karl-Huysmans.pdf
    • http://unieoooq.linkpc.net/14e14e94e84e54e74e7/Olaf-Nicolai---Sammlers-Blick-A-Catalogue-A-Catalogue-by-Boris-Groys.pdf
    • http://unieoooq.linkpc.net/54e94e14e44e44e1/Oeuvres-de-Joris-Karl-Huysmans-by-Joris-Karl-Huysmans.pdf
    • http://unieoooq.linkpc.net/54e94e14e44e34e3/What-Is-Politics-by-Jef-Huysmans.pdf
    • http://unieoooq.linkpc.net/24e14e54e54e04e6/L--Bas-by-Joris-Karl-Huysmans.pdf
    • http://unieoooq.linkpc.net/54e94e14e44e14e6/Downstream-by-Joris-Karl-Huysmans.pdf
    • http://unieoooq.linkpc.net/64e34e64e74e44e7/Against-the-Grain-by-Joris-Karl-Huysmans.pdf
    • http://unieoooq.linkpc.net/74e54e94e54e74e2/Against-the-Grain-by-Joris-Karl-Huysmans.pdf
    • http://unieoooq.linkpc.net/44e14e94e14e04e0/En-Route-by-Joris-Karl-Huysmans.pdf
    • http://unieoooq.linkpc.net/24e94e84e04e34e6/Against-the-Grain-by-Joris-Karl-Huysmans.pdf
    • http://unieoooq.linkpc.net/54e94e14e44e24e4/A-Dilemma-by-Joris-Karl-Huysmans.pdf
    • http://unieoooq.linkpc.net/54e94e14e44e64e2/A-Dish-of-Spices-by-Joris-Karl-Huysmans.pdf
    • http://unieoooq.linkpc.net/94e04e94e94e04e2/Der-Minne-Regel-by-Eberhard.pdf
    • http://unieoooq.linkpc.net/14e14e44e14e14e64e6/Barth-by-Eberhard-Busch.pdf
    • http://unieoooq.linkpc.net/54e94e14e44e34e8/The-Road-from-Decadence-From-Brothel-to-C

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