Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bed7e73acbc67ad…

MALICIOUS

PDF

16.0 KB Created: 2019-05-02 17:08:33 +01:00 Authoring application: mPDF 5.7
MD5: d934e9ffbfa594931f4db7cb374e0fb7 SHA-1: a8f37f059132f4f3634f61f04a50a34931119be9 SHA-256: 5bed7e73acbc67ad80301b31f9babe6bb3f316db7e7146658b9b7f1c7d5478ef
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a link farm, which is a common tactic for SEO manipulation or distributing malicious payloads. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest malicious intent. The document body is heavily obfuscated, preventing a clear understanding of its direct user-facing purpose beyond the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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/8090093097091/The-Communist-Manifesto-and-Other-Revolutionary-Writings-Marx-Marat-Paine-Mao-Gandhi-and-Others-by-Bob-Blaisdell.pdf
    • http://loaminoo.linkpc.net/6095099097099096/The-Communist-Manifesto-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/6099099092095096/Communist-Manifesto-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/1090098098099092096/The-Communist-Manifesto-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/7092098099091093/The-Communist-Manifesto-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/6099099097098096/The-Communist-Manifesto-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/5098099092094090/The-Communist-Manifesto-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/6090099099095093/The-Communist-Manifesto-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/3099093097093092/The-Communist-Manifesto-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/7096096098092092/The-Communist-Manifesto-with-Related-Documents-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/6090092096090098/A-Kommunista-Kialtvany-The-Communist-Manifesto-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/5098098092091096/Manifesto-of-the-Communist-Party-The-Original-Classics---Illustrated-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/8097097090093/Common-Sense-The-Rights-of-Man-and-Other-Essential-Writings-by-Thomas-Paine.pdf
    • http://loaminoo.linkpc.net/1090091096095094090/Manifesto-do-Partido-Comunista-1848-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/7094094097096096/Manifes-Kominis-La-The-Comunist-Manifesto-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/5096098098097099/The-Revolutionary-Ideas-of-Karl-Marx-by-Alex-Callinicos.pdf
    • http://loaminoo.linkpc.net/5096098098094098/Selected-Writings-by-Karl-Marx.pdf
    • http://loaminoo.linkpc.net/3097091090092091/Revolutionary-Writings-1775-1783-by-John-Adams.pdf
    • http://loaminoo.linkpc.net/3097091090091095/Revolutionary-Writings-1755-1775-by-John-Adams.pdf
    • http://loaminoo.linkpc.net/3092094095099097/Two-Alone-Two-Together-Letters-Between-Indira-Gandhi-amp-amp-Jawaharlal-Nehru-1940-64-by-Sonia-Gandhi.pdf

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