Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd7fb1cb159a8c9f…

MALICIOUS

PDF

14.1 KB Created: 2019-04-30 03:23:01 +01:00 Authoring application: mPDF 5.7
MD5: c6045259731f93a049404352797fa7c8 SHA-1: bdb1d61a49a6d303e11a308a572c8b784da83da7 SHA-256: bd7fb1cb159a8c9faa347fbe6711573af0e42e342888ac0e9eeaadcbbcfa49a0
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which are numerically slugged and point to book titles, indicating a link farm or SEO spam tactic. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves luring users to external websites via these links, which are hosted on loaminoo.linkpc.net.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/1096092097090/The-Dollmaker-by-Harriette-Simpson-Arnow.pdf
    • http://loaminoo.linkpc.net/7094097096093/Hunter-s-Horn-by-Harriette-Simpson-Arnow.pdf
    • http://loaminoo.linkpc.net/1094099096093/The-Owner-of-the-House-New-Collected-Poems-1940-2001-by-Louis-Simpson.pdf
    • http://loaminoo.linkpc.net/6095093090095093/The-Romance-of-the-Harem-by-Anna-Harriette-Leonowens.pdf
    • http://loaminoo.linkpc.net/9091094095091/A-New-Love-for-Lisa-Caprice-18-by-Harriette-Sheffer-Abels.pdf
    • http://loaminoo.linkpc.net/3092096093095094/Dear-George-And-Other-Stories-by-Helen-Simpson.pdf
    • http://loaminoo.linkpc.net/1094091097092096/This-Accident-of-Being-Lost-Songs-and-Stories-by-Leanne-Betasamosake-Simpson.pdf
    • http://loaminoo.linkpc.net/2094099097090091/Islands-of-Decolonial-Love-Stories-amp-Songs-by-Leanne-Betasamosake-Simpson.pdf
    • http://loaminoo.linkpc.net/1093098095099090/Collected-Short-Stories-by-Aldous-Huxley.pdf
    • http://loaminoo.linkpc.net/3093093098091090/Stories-The-Collected-Short-Fiction-by-Helen-Garner.pdf
    • http://loaminoo.linkpc.net/4094094095099099/Collected-Short-Stories-Volume-4-by-W-Somerset-Maugham.pdf
    • http://loaminoo.linkpc.net/3092096099093091/In-the-Shadows-of-the-Onion-Domes-Collected-Short-Stories-by-Mary-Pat-Hyland.pdf
    • http://loaminoo.linkpc.net/5091090096095090/Is-by-Anne-Simpson.pdf
    • http://loaminoo.linkpc.net/5099094091098097/The-Burning-of-Manderley-by-M-S-Simpson.pdf
    • http://loaminoo.linkpc.net/5091093097095098/Falling-by-Anne-Simpson.pdf
    • http://loaminoo.linkpc.net/3099095095095091/Ballroom-by-Alice-Simpson.pdf
    • http://loaminoo.linkpc.net/4098092097090095/Thin-Air-by-George-E-Simpson.pdf
    • http://loaminoo.linkpc.net/2092094099098090/Where-the-Trees-Were-by-Inga-Simpson.pdf
    • http://loaminoo.linkpc.net/1099092099093097/Stay-With-Me-by-Riley-Simpson.pdf
    • http://loaminoo.linkpc.net/3099099091092095/Truestory-by-Catherine-Simpson.pdf
    • http://loaminoo.linkpc.net/4094094095099099/C

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