Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6055d9e80fab3cc…

MALICIOUS

PDF

20.9 KB Created: 2019-05-02 18:32:00 +01:00 Authoring application: mPDF 5.7
MD5: 0e85a4fcba06dd8a8e2129d23d4baf8d SHA-1: aa41f4ee5b35119185a43419fc98531d666071d4 SHA-256: a6055d9e80fab3cc6be683b111d8496234a2aeb4dbf78d1f778391c0674bfd31
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 external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF documents hosted on the dynamic DNS domain xiixmcuin.linkpc.net. The ML classifier also flagged this PDF as malicious with high confidence. The document body is heavily obfuscated but contains URLs that are part of this link farm. The primary attack pattern appears to be a link farm or SEO poisoning scheme, designed to drive traffic to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://xiixmcuin.linkpc.net/7202202208209204/Evil-Sisters-The-Threat-of-Female-Sexuality-in-Twentieth-Century-Culture-by-Bram-Dijkstra.pdf
    • http://xiixmcuin.linkpc.net/1209200204204/The-Straight-State-Sexuality-and-Citizenship-in-Twentieth-Century-America-by-Margot-Canaday.pdf
    • http://xiixmcuin.linkpc.net/4200200200202205/Queer-Noises-Male-and-Female-Homosexuality-in-Twentieth-Century-Music-by-John-Gill.pdf
    • http://xiixmcuin.linkpc.net/5201206209202208/Disability-in-Twentieth-Century-German-Culture-by-Carol-Poore.pdf
    • http://xiixmcuin.linkpc.net/2201208205206/Disappearing-Through-the-Skylight-Culture-amp-Technology-in-the-Twentieth-Century-by-O-B-Hardison-Jr-.pdf
    • http://xiixmcuin.linkpc.net/3208205206208209/The-Oxford-History-of-the-British-Empire-Volume-IV-The-Twentieth-Century-Twentieth-Century-Vol-4-by-Judith-M-Brown.pdf
    • http://xiixmcuin.linkpc.net/1206208209204/The-Rise-of-True-Crime-Twentieth-Century-Murder-and-American-Popular-Culture-by-Jean-Murley.pdf
    • http://xiixmcuin.linkpc.net/4202209204206204/Fundamentalism-and-American-Culture-The-Shaping-of-Twentieth-Century-Evangelicalism-1870-1925-by-George-M-Marsden.pdf
    • http://xiixmcuin.linkpc.net/5208206205207204/Collage-in-Twentieth-Century-Art-Literature-and-Culture-Joseph-Cornell-William-Burroughs-Frank-O-Hara-and-Bob-Dylan-by-Rona-Cran.pdf
    • http://xiixmcuin.linkpc.net/1201200202201200/Our-More-Perfect-Union-From-Eighteenth-Century-Principles-to-Twentieth-Century-Practice-by-Arthur-Norman-Holcombe.pdf
    • http://xiixmcuin.linkpc.net/1201203205204205204/Identification-Papers-Readings-on-Psychoanalysis-Sexuality-and-Culture-by-Diana-Fuss.pdf
    • http://xiixmcuin.linkpc.net/7201205206209207/Fault-Lines-Sexuality-Incest-and-Catholic-Family-Culture-by-Tish-Langlois.pdf
    • http://xiixmcuin.linkpc.net/8206200202208204/Art-of-the-Twentieth-Century-by-Ingo-F-Walther.pdf
    • http://xiixmcuin.linkpc.net/4205207201205/From-the-End-of-the-Twentieth-Century-by-John-M-Ford.pdf
    • http://xiixmcuin.linkpc.net/9202203205205/In-Europe-Travels-Through-the-Twentieth-Century-by-Geert-Mak.pdf
    • http://xiixmcuin.linkpc.net/1200202200205202206/Saga-Into-the-Twentieth-Century-by-Louise-Haeger.pdf
    • http://xiixmcuin.linkpc.net/3202209202201202/Allergic-to-the-Twentieth-Century-by-Peter-Radetsky.pdf
    • http://xiixmcuin.linkpc.net/4204207204201201/The-Man-Who-Invented-the-Twentieth-Century-by-Robert-Lomas.pdf
    • http://xiixmcuin.linkpc.net/1205204206208208/Paris-in-the-Twentieth-Century-by-Jules-Verne.pdf
    • http://xiixmcuin.linkpc.net/1205207208203/Other-Criteria-Confrontations-with-Twentieth-Century-Art-by-Leo-Steinberg.pdf
    • http://xiixmcuin.linkpc.net/1206208209204/The-