Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e68fb522e25d73…

MALICIOUS

PDF

14.7 KB Created: 2019-05-02 05:09:34 +01:00 Authoring application: mPDF 5.7
MD5: f5c1074ea3d7874fe65e0cfce4dc1f75 SHA-1: 08f7cbf8ea4781eadc9253f0524d2d97831c2b86 SHA-256: 27e68fb522e25d731922d494b17ca7724a5c4da60be60e58c0aa25c142c2a921
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While the URLs themselves are currently marked as benign, the sheer volume and structure suggest a malicious intent, possibly for SEO manipulation or to distribute further malware. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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/9098093094092091/Three-by-Vonnegut-Cat-s-Cradle-Slaughterhouse-Five-Breakfast-of-Champions-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/1095098096090/Slaughterhouse-Five-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/6092091092095098/Slaughterhouse-Five-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/9098093094091096/Kurt-Vonnegut---Slaughterhouse-Five-by-David-Federhen.pdf
    • http://loaminoo.linkpc.net/9098093094091098/Kurt-Vonnegut-s-Slaughterhouse-five-by-Harold-Bloom.pdf
    • http://loaminoo.linkpc.net/6093096094094095/Slaughterhouse-Five-or-The-Children-s-Crusade-Reading-Guide-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/6093094094094/Slaughterhouse-five-The-Children-s-Crusade-A-Duty-dance-with-Death-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/9098093093097098/Slaughterhouse-Five-The-Sirens-Of-Titan-Player-Piano-Cat-s-Cradle-Breakfast-Of-Champions-Mother-Night-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/9092098094090096/Building-the-Monkey-House-At-Kurt-Vonnegut-s-Writing-Table-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/5093091096090090/Kurt-Vonnegut-The-Last-Interview-and-Other-Conversations-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/9098093094098095/The-Kurt-Vonnegut-Jr-Audio-Collection-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/9098093093097096/Essential-Vonnegut-Interviews-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/3092097090090092/Next-Door-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/2099097093093091/Drawings-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/9098093093098094/FUBAR-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/2098095094099090/Cat-s-Cradle-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/9092098093092093/Timequake-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/3097099097096091/Jailbird-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/9098093094098097/The-Kid-Nobody-Could-Handle-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/8092097098095/Cat-s-Cradle-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/9098093093097098/Slaughterhouse-Five-The-Sirens-Of-Titan-Player-Piano-Cat-s-Cradle-Breakfast-Of-Champions-Mot

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