Malicious PDF — malware analysis report

Static analysis result for SHA-256 850bd16531738a51…

MALICIOUS

PDF

19.0 KB Created: 2019-04-30 04:21:03 +01:00 Authoring application: mPDF 5.7
MD5: 3f0f82a8c1a7c49543e9b8c6ffb760e0 SHA-1: 08a0a0305afed9072069fe5a8c0c91bba84704dc SHA-256: 850bd16531738a51e9b3964ddf8cf78f59941ed0683b320cc270169fb4e293c4
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of external links, identified as a link farm by the PDF_SEO_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS classifier also flagged the document with high confidence. The embedded URLs, while individually marked as benign, collectively form the basis of the attack. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://muicuiu.dumb1.com/3a06a08a02a08a02/Tangled-in-Divine-Divine-Creek-Ranch-14-by-Heather-Rainier.pdf
    • http://muicuiu.dumb1.com/3a06a08a02a08a03/Sparks-Fly-a-Divine-Creek-July-4th-Family-Reunion-Divine-Creek-Ranch-11-by-Heather-Rainier.pdf
    • http://muicuiu.dumb1.com/3a03a02a02a05a03/Margot-s-Hunger-Divine-Creek-Ranch-11-5-by-Heather-Rainier.pdf
    • http://muicuiu.dumb1.com/4a09a07a03a05a01/Absentminded-Angel-Divine-Creek-Ranch-20-by-Heather-Rainier.pdf
    • http://muicuiu.dumb1.com/2a09a08a07a01a04/Tiny-Dancer-Divine-Creek-Ranch-13-by-Heather-Rainier.pdf
    • http://muicuiu.dumb1.com/2a09a07a02a07a09/Her-Gentle-Giant-Part-1-No-Regrets-Divine-Creek-Ranch-2-by-Heather-Rainier.pdf
    • http://muicuiu.dumb1.com/3a09a03a00a05a09/Divine-Secrets-Divine-and-Friends-3-by-Jacquelin-Thomas.pdf
    • http://muicuiu.dumb1.com/4a07a02a00a01a01/A-Divine-Life-The-Divine-Trilogy-2-by-R-E-Hargrave.pdf
    • http://muicuiu.dumb1.com/9a03a08a06a00/Votive-Mass-of-the-Divine-Heart-of-God-the-Father-Texts-and-Lectionary-by-Apostolate-of-the-Divine-Heart.pdf
    • http://muicuiu.dumb1.com/1a00a07a02a01a01a03/The-Dark-Divine-The-Dark-Divine-1-by-Bree-Despain.pdf
    • http://muicuiu.dumb1.com/9a04a08a02a06a08/THE-CHAPLET-OF-DIVINE-MERCY-DEVOTION-TO-THE-DIVINE-MERCY-CHAPLET-by-James-Joseph.pdf
    • http://muicuiu.dumb1.com/1a00a02a08a07a01a09/The-Divine-Comedy-William-Blake-William-Blake-Die-G-ttliche-Kom-die-La-Divine-Com-die-William-Blake-by-David-Bindman.pdf
    • http://muicuiu.dumb1.com/9a05a03a07/The-Pines-of-Winder-Ranch-A-Cold-Creek-Homecoming-A-Cold-Creek-Reunion-by-RaeAnne-Thayne.pdf
    • http://muicuiu.dumb1.com/2a04a01a03a00a07/Trouble-Brewing-in-Thunder-Creek-Thunder-Creek-Ranch-3-by-Lorraine-Nelson.pdf
    • http://muicuiu.dumb1.com/1a07a06a00a00a03/I-Look-Divine-by-Christopher-Coe.pdf
    • http://muicuiu.dumb1.com/6a08a08a02a02a04/Secrets-of-Divine-by-Thana.pdf
    • http://muicuiu.dumb1.com/4a00a05a08a09a01/The-Life-Divine-by-Sri-Aurobindo.pdf
    • http://muicuiu.dumb1.com/8a04a01a07a06a08/Execution-The-Divine-6-by-M-R-Forbes.pdf
    • http://muicuiu.dumb1.com/3a09a05a08a02a07/The-Life-Divine-by-Sri-Aurobindo.pdf
    • http://muicuiu.dumb1.com/2a08a07a06a04a03/Divine-Right-s-Trip-by-Gurney-Norman.pdf
    • http://muicuiu.dumb1.com/9a03a08a06a00/Votive-Mass-of-the-Divine-Heart-of-God-the-Father-Texts-and-Lection

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