Malicious PDF — malware analysis report

Static analysis result for SHA-256 81702acf4fef77b2…

MALICIOUS

PDF

12.6 KB Created: 2019-05-02 17:22:42 +01:00 Authoring application: mPDF 5.7
MD5: 32b8abac42ae2b4a524e64e81f12e358 SHA-1: 76439f1e1ffe603a77344424b84b2728c5860311 SHA-256: 81702acf4fef77b2de5f39dc5401eefff9ae301a43ca4d9297c144e8fe5f7ad7
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, identified as a link farm. While the URLs themselves are currently marked as benign, the sheer volume and structure suggest an attempt to obscure malicious intent or to distribute further malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs points towards a potential phishing or content distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8780

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/9091098090094094/Threebies-Kazuo-Ishiguro-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/2095097095098097/Never-Let-Me-Go-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/6091092093093/Never-Let-Me-Go-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/2091095099096/Never-Let-Me-Go-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/2095099099091097/Never-Let-Me-Go-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/4098092099090096/The-Remains-of-the-Day-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/2098091098093093/The-Remains-of-the-Day-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/3096095096092/The-Unconsoled-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/1099098090097092/The-Unconsoled-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/2094099098091091/The-Remains-of-the-Day-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/1091093096099094092/Kazuo-Ishiguro-by-Wai-chew-Sim.pdf
    • http://loaminoo.linkpc.net/2094095094092093/The-Buried-Giant-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/8095090090091092/Non-me-deixes-nunca-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/1090090094092099/Nikad-me-ne-ostavljaj-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/1095091094094093/The-Buried-Giant-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/1091093097090094095/About-Kazuo-Ishiguro-The-Remains-of-the-Day-by-Stefanie-Grill.pdf
    • http://loaminoo.linkpc.net/2094099096095099/An-Artist-of-the-Floating-World-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/2093091090091093/Conversations-with-Kazuo-Ishiguro-by-Brian-W-Shaffer.pdf
    • http://loaminoo.linkpc.net/3091095093095097/Laat-me-nooit-alleen-by-Kazuo-Ishiguro.pdf
    • http://loaminoo.linkpc.net/1091093096098090097/Understanding-Kazuo-Ishiguro-by-Brian-W-Shaffer.pdf

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