Malicious PDF — malware analysis report

Static analysis result for SHA-256 440805b262c8084d…

MALICIOUS

PDF

21.3 KB Created: 2019-05-02 17:08:17 +01:00 Authoring application: mPDF 5.7
MD5: dfe594e25018a6ac87a0c0513cc62498 SHA-1: 5897d378eba53ec2448500c91028dd25693670f0 SHA-256: 440805b262c8084dfff9da90e517018773752e8fa757190468d31790f5ceb3a3
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. These URLs point to external PDF documents, suggesting a link farm or redirection scheme. While the ML classifier flagged this as malicious, the specific intent beyond linking to other documents is unclear as no scripts were extracted and the document body was heavily obfuscated. The primary attack pattern observed is the mass distribution of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/44e04e34e84e74e0/Women-A-Pictorial-Archive-from-Nineteenth-Century-Sources-by-Jim-Harter.pdf
    • http://unieoooq.linkpc.net/54e14e64e34e44e0/Realizations-Narrative-Pictorial-and-Theatrical-Arts-in-Nineteenth-Century-England-by-Martin-Meisel.pdf
    • http://unieoooq.linkpc.net/44e34e84e24e64e7/Hen-Frigates-Passion-and-Peril-Nineteenth-Century-Women-at-Sea-by-Joan-Druett.pdf
    • http://unieoooq.linkpc.net/44e54e94e54e44e8/Nineteenth-Century-Women-Poets-An-Oxford-Anthology-by-Isobel-Armstrong.pdf
    • http://unieoooq.linkpc.net/94e24e24e64e14e8/Women-Art-Critics-in-Nineteenth-Century-France-Vanishing-Acts-by-Wendelin-Guentner.pdf
    • http://unieoooq.linkpc.net/44e94e74e24e74e1/Tuning-Containing-The-Perfection-Of-Eighteenth-Century-Temperament-The-Lost-Art-Of-Nineteenth-Century-Temperament-And-The-Science-Of-Equal-Temperament-Complete-With-Instructions-For-Aural-And-Electronic-Tuning-by-Owen-H-Jorgensen.pdf
    • http://unieoooq.linkpc.net/44e44e54e14e24e7/Paris-and-the-Nineteenth-Century-by-Christopher-Prendergast.pdf
    • http://unieoooq.linkpc.net/74e94e24e04e84e9/Capital-in-the-Nineteenth-Century-by-Paul-W-Rhode.pdf
    • http://unieoooq.linkpc.net/94e24e94e74e14e0/The-Red-and-the-Black-A-Chronicle-of-the-Nineteenth-Century-by-Stendhal.pdf
    • http://unieoooq.linkpc.net/14e04e74e84e44e34e4/A-Photographic-Guide-to-Marionettes-in-the-Nineteenth-Century-by-Max-Von-Boehn.pdf
    • http://unieoooq.linkpc.net/14e04e74e84e54e54e2/A-Photographic-Guide-to-Toy-Dolls-in-the-Nineteenth-Century-by-Max-Von-Boehn.pdf
    • http://unieoooq.linkpc.net/84e94e94e34e94e6/Philanthropy-in-Nineteenth-Century-Ireland-by-Oonagh-Walsh.pdf
    • http://unieoooq.linkpc.net/94e74e74e74e44e1/North-American-Adult-Educators-Phyllis-M-Cunningham-Archive-Of-Quintessential-Autobiographies-For-The-Twenty-First-Century-by-Keith-B-Armstrong.pdf
    • http://unieoooq.linkpc.net/14e64e84e34e24e7/Horace-Greeley-Nineteenth-Century-Crusader-by-Glyndon-G-Van-Deusen.pdf
    • http://unieoooq.linkpc.net/14e14e64e74e14e64e8/Gaslight-Lantern-Slides-from-the-Nineteenth-Century-by-Joachim-Kalka.pdf
    • http://unieoooq.linkpc.net/54e04e84e44e04e5/Eve-and-the-New-Jerusalem-Socialism-and-Feminism-in-the-Nineteenth-Century-by-Barbara-Taylor.pdf
    • http://unieoooq.linkpc.net/34e24e24e84e34e9/London-in-the-Nineteenth-Century-A-Human-Awful-Wonder-of-God-by-Jerry-White.pdf
    • http://unieoooq.linkpc.net/24e34e44e24e0/Karl-Marx-A-Nineteenth-Century-Life-by-Jonathan-Sperber.pdf
    • http://unieoooq.linkpc.net/74e44e04e34e14e8/Cholera-Curse-of-the-Nineteenth-Century-by-Stephanie-True-Peters.pdf
    • http://unieoooq.linkpc.net/84e24e04e14e34e9/Paris-Nineteenth-Century-Architecture-And-Urbanism-by-Fran-ois-Loyer.pdf
    • http://unieoooq.linkpc.net/44e44e54e14e2