Malicious PDF — malware analysis report

Static analysis result for SHA-256 e397f2fb665f8f34…

MALICIOUS

PDF

23.1 KB Created: 2019-04-30 04:14:44 +01:00 Authoring application: mPDF 5.7
MD5: 2d52d7081c1e5d9535e29d7aae085f68 SHA-1: 8bafa93b652b2bf9fbba5a61fa065a5caa51d3dc SHA-256: e397f2fb665f8f34d7b45899397ecaec2db30049367641ff41fd154d18b2e862
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 were classified as benign, the sheer volume and the nature of the heuristic suggest a malicious intent, possibly for SEO manipulation or to distribute further malicious content. The ML_NYX_PDF_MALICIOUS classifier also strongly indicated maliciousness. 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://seasasac.lflinkup.com/8da9da2da7da0da2/A-Child-s-History-of-the-United-States-in-Verse-by-Emma-Wortmann.pdf
    • http://seasasac.lflinkup.com/1da0da1da4da3da3da1/United-States-Circuit-Court-of-Appeals-for-the-Ninth-Circuit-1912-Vol-5-of-6-Transcript-of-Record-William-F-Kettenbach-and-George-H-Kester-Plaintiffs-in-Error-Vs-The-United-States-of-America-Defendant-in-Error-Pages-1521-to-1916-Inclusive-by-United-States-Court-of-Appeals.pdf
    • http://seasasac.lflinkup.com/9da4da6da4da3da0/A-People-s-History-of-the-United-States-by-Howard-Zinn.pdf
    • http://seasasac.lflinkup.com/9da8da2da0da3/A-Queer-History-of-the-United-States-by-Michael-Bronski.pdf
    • http://seasasac.lflinkup.com/3da3da8da1da0da0/The-Cartoon-History-of-the-United-States-by-Larry-Gonick.pdf
    • http://seasasac.lflinkup.com/7da9da8da3da3da5/A-History-of-Christianity-in-the-United-States-and-Canada-by-Mark-A-Noll.pdf
    • http://seasasac.lflinkup.com/7da2da4da6da6/The-Americans-A-Social-History-of-the-United-States-1587-1914-by-J-C-Furnas.pdf
    • http://seasasac.lflinkup.com/6da1da6da2da4da2/A-People-s-History-of-the-United-States-1492-to-Present-by-Howard-Zinn.pdf
    • http://seasasac.lflinkup.com/5da2da0da6da1da7/Catholic-Moral-Theology-in-the-United-States-A-History-by-Charles-E-Curran.pdf
    • http://seasasac.lflinkup.com/2da7da5da1da5da1/An-Indigenous-Peoples-History-of-the-United-States-by-Roxanne-Dunbar-Ortiz.pdf
    • http://seasasac.lflinkup.com/1da1da8da2da0da4da2/Harper-s-Encyclopedia-of-United-States-History-from-458-A-D-to-1909-by-Woodrow-Wilson.pdf
    • http://seasasac.lflinkup.com/3da0da3da2da4da1/United-States-History-Preparing-for-the-Advanced-Placement-Examination-by-John-J-Newman.pdf
    • http://seasasac.lflinkup.com/1da1da8da2da1da6da1/Harper-s-Encyclopedia-of-United-States-History-Vol-10-of-10-From-458-A-D-to-1906-by-Benson-John-Lossing.pdf
    • http://seasasac.lflinkup.com/4da4da7da6da8da1/Chop-Suey-A-Cultural-History-of-Chinese-Food-in-the-United-States-by-Andrew-Coe.pdf
    • http://seasasac.lflinkup.com/5da1da7da6da0da9/The-History-of-Foreign-Investment-in-the-United-States-1914-1945-by-Mira-Wilkins.pdf
    • http://seasasac.lflinkup.com/5da5da5da4da0da2/Kinship-by-Design-A-History-of-Adoption-in-the-Modern-United-States-by-Ellen-Herman.pdf
    • http://seasasac.lflinkup.com/1da1da8da2da1da5da1/Harper-s-Encyclopedia-of-United-States-History-from-458-A-D-to-1905-Volume-2-by-Woodrow-Wilson.pdf
    • http://seasasac.lflinkup.com/3da7da0da5da4da3/A-People-and-a-Nation-A-History-of-the-United-States-To-1877-by-Mary-Beth-Norton.pdf
    • http://seasasac.lflinkup.com/6da0da2da7da5da8/Working-At-Play-A-History-Of-Vacations-In-The-United-States-by-Cindy-Sondik-Aron.pdf
    • http://seasasac.lflinkup.com/4da1da5da9da8da6/A-Young-People-s-History-of-the-United-States-Columbus-to-the-War-on-Terror-by-Howard-Zinn.pdf
    • http://seasasac.lflinkup.com/7da2da4da6da6/The-Americans-A-Social-History-of-the-United-States-1587-1914-by-J-C-Furnas.p

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