Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd3ab37bff5c6e9…

MALICIOUS

PDF

18.6 KB Created: 2019-04-30 09:02:08 +01:00 Authoring application: mPDF 5.7
MD5: 2bc747f20453d904fae0743f0ec74bcf SHA-1: 8f46de1af32e71faa4ae862272729a8b258f4ab9 SHA-256: 8dd3ab37bff5c6e91c6aed7ce28bc0c57689d3173fada4db73342748f0c849fe
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself is suspicious. The primary IOCs are the numerous URLs hosted on loaminoo.linkpc.net.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/1090094090096094/The-Birth-of-the-People-s-Republic-of-Antarctica-by-John-Calvin-Batchelor.pdf
    • http://loaminoo.linkpc.net/2098098092096099/Chefs-of-the-Mountains-Restaurants-amp-Recipes-from-the-Western-North-Carolina-by-John-E-Batchelor.pdf
    • http://loaminoo.linkpc.net/1098095099095098/The-People-s-Republic-of-Chemicals-by-William-J-Kelly.pdf
    • http://loaminoo.linkpc.net/9096096095092/The-People-s-Republic-of-Amnesia-Tiananmen-Revisited-by-Louisa-Lim.pdf
    • http://loaminoo.linkpc.net/1099096094091099/Mao-s-China-and-After-A-History-of-the-People-s-Republic-by-Maurice-J-Meisner.pdf
    • http://loaminoo.linkpc.net/4093098095096094/China-on-the-Lam-On-Foot-Across-the-People-s-Republic-by-Bill-Purves.pdf
    • http://loaminoo.linkpc.net/6090092097097/On-Self-Denial-by-John-Calvin.pdf
    • http://loaminoo.linkpc.net/6095094098099096/Institutes-of-the-Christian-Religion-by-John-Calvin.pdf
    • http://loaminoo.linkpc.net/6097093099099094/Treatises-Against-The-Anabaptists-And-Against-The-Libertines-by-John-Calvin.pdf
    • http://loaminoo.linkpc.net/2093094099095092/The-Betrayal-A-Novel-on-John-Calvin-by-Douglas-Bond.pdf
    • http://loaminoo.linkpc.net/3093099091092097/Star-Wars-Knights-of-the-Old-Republic-Vol-6-Vindication-Star-Wars-Knights-of-the-Old-Republic-6-by-John-Jackson-Miller.pdf
    • http://loaminoo.linkpc.net/3093099093091098/Star-Wars-Knights-of-the-Old-Republic-Vol-1-Commencement-Star-Wars-Knights-of-the-Old-Republic-1-by-John-Jackson-Miller.pdf
    • http://loaminoo.linkpc.net/4090095097/Institutes-of-the-Christian-Religion-2-Vols-by-John-Calvin.pdf
    • http://loaminoo.linkpc.net/1090090099091096099/John-Calvin-Pilgrim-and-Pastor-by-W-Robert-Godfrey.pdf
    • http://loaminoo.linkpc.net/9090090094098096/The-Expository-Genius-of-John-Calvin-by-Steven-J-Lawson.pdf
    • http://loaminoo.linkpc.net/1095094093092093/Decline-of-the-American-Republic-by-John-T-Flynn.pdf
    • http://loaminoo.linkpc.net/5091090093094099/Republic-of-Women-Rethinking-the-Republic-of-Letters-in-the-Seventeenth-Century-by-Carol-Pal.pdf
    • http://loaminoo.linkpc.net/1090091096096099099/The-Republic-in-Crisis-1848-1861-by-John-Ashworth.pdf
    • http://loaminoo.linkpc.net/3098097099096090/Re-Birth-by-John-Wyndham.pdf
    • http://loaminoo.linkpc.net/7099098098099093/Institvtio-christianae-religionis-ab-ipso-authore-anno-1559-amp-in-libros-quatuor-digesta-cert-by-John-Calvin.pdf
    • http://loaminoo.linkpc.net/6095094098099096/Institutes-of-the-Christian-Religio

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