Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63d835485945efd…

MALICIOUS

PDF

16.0 KB Created: 2019-04-30 08:13:28 +01:00 Authoring application: mPDF 5.7
MD5: 1ab8242512b55fe8250a8a78539c2d9c SHA-1: b32cbbb81ec4169fee414bf84ef3d9f7545b2023 SHA-256: b63d835485945efd22a84698083ac873e515d53790893173958a8a50a40a7aed
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While many of these links point to what appear to be legitimate books, the sheer volume and the ML classifier's high confidence score suggest a malicious intent, possibly for SEO poisoning or to distribute further malware. The document body is heavily obfuscated but contains URLs that are also listed in the extracted URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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/7096095094098091/The-First-Rafael-Sabatini-s-Collected-Works-The-Sea-Hawk-Scaramouche-Captain-Blood-Mistress-Wilding-The-Lion-s-Skin-The-Life-of-Cesare-Borgia-The-Strolling-Saint-and-More-15-Works-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/7096095093099091/Scaramouche-and-Other-Works-by-Rafael-Sabatini-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/4099094093096/Scaramouche-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/2095093097093098/Scaramouche-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/4098090093094098/The-Sea-Hawk-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/1093093091090096/King-In-Prussia-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/7091096098090093/The-Suitors-of-Yvonne-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/1093092096095097/The-Lovers-of-Yvonne-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/1093094092095096/Mistress-Wilding-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/1093092098092092/The-Tavern-Knight-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/1093093097092095/The-Shame-of-Motley-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/5096095091099092/Captain-Blood-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/1093094097095099/The-Romantic-Prince-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/1093093093098092/The-Justice-of-the-Duke-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/1093091098093097/The-Fool-s-Love-Story-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/7095093091090094/Scaramouche-Plus-Bardelys-the-Magnificent-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/1090096097093099097/Below-the-Surface-by-Michael-Hofmeister.pdf
    • http://loaminoo.linkpc.net/7096095093098097/Scaramouche-A-Romance-of-the-French-Revolution-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/7096095094090097/Scaramouche-the-Kingmaker-Special-Edition-by-Rafael-Sabatini.pdf
    • http://loaminoo.linkpc.net/5090099092093091/Surface-of-the-Lit-World-by-Shane-Seely.pdf

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