Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a77e61d82b60b0…

MALICIOUS

PDF

18.4 KB Created: 2019-04-29 23:07:00 +01:00 Authoring application: mPDF 5.7
MD5: acd183432c670b0b8f7122d2f6d934ae SHA-1: 3ab2cb4f237ab079ab6be0abcee6a51b84c05732 SHA-256: 09a77e61d82b60b02bffecdc13edd93a4804a1f007cb7a3ccea4766c93d9fa28
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to other PDF files, identified as a 'link farm'. This technique is often used for SEO manipulation or as a precursor to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

Heuristics 3

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/8a02a02a06a08a06/The-Wynne-Diaries-by-Elizabeth-Wynne.pdf
    • http://muicuiu.dumb1.com/9a06a04a07a05a09/Marcus-Aurelius-Selbstbetrachtungen-Vollst-ndige-deutsche-Ausgabe-Selbsterkenntnisse-des-r-mischen-Kaisers-Marcus-Aurelius-by-Marc-Aurel.pdf
    • http://muicuiu.dumb1.com/1a01a05a08a04a00a04/Meditations-of-Marcus-Aurelius---Enhanced-and-Hyper-Linked-Kindle-Edition-by-Marcus-Aurelius.pdf
    • http://muicuiu.dumb1.com/3a07a07a09a00a06/The-Only-Option-by-Eve-Adam.pdf
    • http://muicuiu.dumb1.com/6a02a09a08a08a05/The-Philosophy-and-Opinions-of-Marcus-Garvey-Or-Africa-for-the-Africans-by-Marcus-Garvey.pdf
    • http://muicuiu.dumb1.com/6a03a05a05a03a05/Meditations-In-Verse-Illustrated-The-Sonnets-of-Marcus-Aurelius-by-Marcus-Aurelius.pdf
    • http://muicuiu.dumb1.com/3a06a00a05a08a09/The-Byrdwhistle-option-by-Robert-H-Rimmer.pdf
    • http://muicuiu.dumb1.com/2a05a03a04a06a08/The-Prometheus-Option-by-Jeff-Kirk.pdf
    • http://muicuiu.dumb1.com/4a05a06a09a07a01/Immortality-Option-by-James-P-Hogan.pdf
    • http://muicuiu.dumb1.com/3a03a05a08a04a07/The-Kill-Option-by-Bryan-Cassiday.pdf
    • http://muicuiu.dumb1.com/3a05a08a02a06a09/Final-Option-by-Leighton-Rockafellow.pdf
    • http://muicuiu.dumb1.com/1a01a04a06a01a04a05/The-Meditations-of-the-Emperor-Marcus-Aurelius-Antoninus-by-Marcus-Aurelius.pdf
    • http://muicuiu.dumb1.com/1a01a04a02a06a00a04/The-Camelot-Series-the-Meditations-of-Marcus-Aurelius-by-Marcus-Aurelius.pdf
    • http://muicuiu.dumb1.com/6a03a09a01a04a01/Dante-s-Inferno-Adapted-by-Marcus-Sanders-by-Marcus-Sanders.pdf
    • http://muicuiu.dumb1.com/6a02a09a05a02a08/The-Communings-with-Himself-of-Marcus-Aurelius-Emperor-of-Rome-by-Marcus-Aurelius.pdf
    • http://muicuiu.dumb1.com/3a04a03a00a08a01/Failure-Is-an-Option-An-Attempted-Memoir-by-H-Jon-Benjamin.pdf
    • http://muicuiu.dumb1.com/2a01a09a07a01a07/The-Shiva-Option-Starfire-4-by-David-Weber.pdf
    • http://muicuiu.dumb1.com/3a07a02a01a01a00/The-Assassination-Option-Clandestine-Operations-2-by-W-E-B-Griffin.pdf
    • http://muicuiu.dumb1.com/1a04a00a02a01a01/Zero-Option-Geordie-Sharp-2-by-Chris-Ryan.pdf
    • http://muicuiu.dumb1.com/1a00a01a07a04a09a08/Can-t-Is-Not-an-Option-My-American-Story-by-Nikki-Haley.pdf

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