Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38e60f8f4bb9d6e…

MALICIOUS

PDF

13.9 KB Created: 2019-05-02 05:10:57 +01:00 Authoring application: mPDF 5.7
MD5: c8d3f406a06665d1d4423f364e976fd9 SHA-1: b3d15868b050f609b1444479be848b6429dfde74 SHA-256: a38e60f8f4bb9d6e39e4b60698f6d4933c7174dfe9756b0069abbcdbd11cbfef
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. While the specific URLs themselves are marked as benign, the sheer volume and the nature of the heuristic suggest a malicious intent, likely to manipulate search engine results or redirect users to potentially harmful content. The ML classifier also flagged the document as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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/1099092096098097/Man-and-Camel-by-Mark-Strand.pdf
    • http://loaminoo.linkpc.net/4098094096091/Poems-from-Ish-River-Country-Collected-Poems-and-Translations-by-Robert-Sund.pdf
    • http://loaminoo.linkpc.net/4095099097093094/The-Weather-of-Words-Poetic-Inventions-by-Mark-Strand.pdf
    • http://loaminoo.linkpc.net/1090097093092093099/Upstairs-at-the-Strand-Writers-in-Conversation-at-the-Legendary-Bookstore-by-Jessica-Strand.pdf
    • http://loaminoo.linkpc.net/1090095093091097097/Joan-of-Arc-The-Collection-5-Collected-Works-by-Mark-Twain-Laura-E-Richards-Lord-Ronald-Gower-Lucy-Foster-Madison-and-Mrs-Oliphant-by-Mark-Twain.pdf
    • http://loaminoo.linkpc.net/8095092098092096/The-Collected-Poems-by-A-E-Housman.pdf
    • http://loaminoo.linkpc.net/4095099098098092/New-Collected-Poems-by-Les-Murray.pdf
    • http://loaminoo.linkpc.net/5090096099098092/Collected-Poems-by-Primo-Levi.pdf
    • http://loaminoo.linkpc.net/1099092094095/Collected-Poems-by-James-Schuyler.pdf
    • http://loaminoo.linkpc.net/5091097095090096/The-Collected-Poems-by-Sterling-A-Brown.pdf
    • http://loaminoo.linkpc.net/9090095093095/Collected-Poems-by-Robert-Lowell.pdf
    • http://loaminoo.linkpc.net/3090093092095091/Collected-Poems-by-Mervyn-Peake.pdf
    • http://loaminoo.linkpc.net/5098094091090094/The-Collected-Poems-by-Muriel-Rukeyser.pdf
    • http://loaminoo.linkpc.net/4098094091098091/The-Collected-Poems-by-Kenneth-Koch.pdf
    • http://loaminoo.linkpc.net/1098099094095095/Collected-Poems-by-John-Betjeman.pdf
    • http://loaminoo.linkpc.net/2093096093097/Collected-Poems-by-Josephine-Miles.pdf
    • http://loaminoo.linkpc.net/2093091092098/The-Collected-Poems-by-Howard-Nemerov.pdf
    • http://loaminoo.linkpc.net/2093092092091/Collected-Poems-by-Marianne-Moore.pdf
    • http://loaminoo.linkpc.net/2099096091099098/The-Collected-Poems-by-Sylvia-Plath.pdf
    • http://loaminoo.linkpc.net/6091091096093096/Return-Poems-Collected-And-New-by-Alurista.pdf
    • http://loaminoo.linkpc.net/9090095093095/Collected-Poems-by-Robert-Lo

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