Malicious PDF — malware analysis report

Static analysis result for SHA-256 761a8ad6f3dc049e…

MALICIOUS

PDF

15.7 KB Created: 2019-11-08 00:37:19 +00:00 Authoring application: mPDF 5.7
MD5: 776e69e3a0d32be438bc1f37f931ce21 SHA-1: f8139b602f15e4563618f057fc7f36780bb6f0fa SHA-256: 761a8ad6f3dc049ef0253855d0f750efe4c1aab554d1f6996503fbed145feabb
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this document as malicious with high confidence. While the URLs themselves are currently classified as benign, the sheer volume and the heuristic firing suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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://cefasfese.4pu.com/5737737734735730/Hub-Fans-Bid-Kid-Adieu-John-Updike-on-Ted-Williams-by-John-Updike.pdf
    • http://cefasfese.4pu.com/4736738730738734/Self-Consciousness-by-John-Updike.pdf
    • http://cefasfese.4pu.com/4736731737737733/Couples-by-John-Updike.pdf
    • http://cefasfese.4pu.com/4738733737732/Couples-by-John-Updike.pdf
    • http://cefasfese.4pu.com/2732730734735/The-Coup-by-John-Updike.pdf
    • http://cefasfese.4pu.com/3731733731731730/12-Terrors-of-Christmas-by-John-Updike.pdf
    • http://cefasfese.4pu.com/3738737737736738/Olinger-Stories-by-John-Updike.pdf
    • http://cefasfese.4pu.com/2735739739736736/Rabbit-Redux-by-John-Updike.pdf
    • http://cefasfese.4pu.com/7730732731737/A-Child-s-Calendar-by-John-Updike.pdf
    • http://cefasfese.4pu.com/8734734739738/Seek-My-Face-by-John-Updike.pdf
    • http://cefasfese.4pu.com/7731738736737/The-Early-Stories-by-John-Updike.pdf
    • http://cefasfese.4pu.com/4738734735737731/The-Afterlife-and-Other-Stories-by-John-Updike.pdf
    • http://cefasfese.4pu.com/1736731731736/The-Poorhouse-Fair-by-John-Updike.pdf
    • http://cefasfese.4pu.com/2731739733731/Roger-s-Version-by-John-Updike.pdf
    • http://cefasfese.4pu.com/1734730733733738/In-the-Beauty-of-the-Lilies-by-John-Updike.pdf
    • http://cefasfese.4pu.com/2731733734734/Hugging-the-Shore-Essays-and-Criticism-by-John-Updike.pdf
    • http://cefasfese.4pu.com/6735736734732733/The-Best-American-Short-Stories-of-the-Century-The-Best-American-Series-TM-by-John-Updike.pdf
    • http://cefasfese.4pu.com/1731739736737732731/The-Organ-Bank-Farm-by-John-Boyd.pdf
    • http://cefasfese.4pu.com/2735736738732733/You-Can-Farm-The-Entrepreneur-s-Guide-to-Start-and-Succeed-in-a-Farm-Enterprise-by-Joel-Salatin.pdf
    • http://cefasfese.4pu.com/7734730739731737/The-Seasons-on-Henry-s-Farm-A-Year-of-Food-and-Life-on-a-Sustainable-Farm-by-Terra-Brockman.pdf

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