Malicious PDF — malware analysis report

Static analysis result for SHA-256 a077802586b0623d…

MALICIOUS

PDF

13.7 KB Created: 2019-05-02 00:54:49 +01:00 Authoring application: mPDF 5.7 First seen: 2021-10-23
MD5: a795a1127d11356440c2681a8b06eaf1 SHA-1: ae26f06bec9f39434eb5238c54732bf88c0e93ac SHA-256: a077802586b0623d79dc950c554f450a2493ab6d5dc083d0acf38b62d2fb353d
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs disguised as book titles, a common social engineering tactic to trick users into downloading malicious files. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9200

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/2a09a08a08a03a05/Walk-Two-Moons-by-Sharon-Creech.pdf In PDF document text
    • http://muicuiu.dumb1.com/2a07a05a07a07/Ruby-Holler-by-Sharon-Creech.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a03a06a03a04/Chasing-Redbird-by-Sharon-Creech.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a03a07a03a07/Walk-Two-Moons-by-Sharon-Creech.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a02a02a09a08a08/Walk-Two-Moons-by-Sharon-Creech.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a09a03a05a01/The-Castle-Corona-by-Sharon-Creech.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a02a00a03a03/Hate-That-Cat-Jack-2-by-Sharon-Creech.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a07a09a06a08a02/Absolutely-Normal-Chaos-by-Sharon-Creech.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a06a06a04a03/Granny-Torrelli-Makes-Soup-by-Sharon-Creech.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a03a02a07a09a01/Walk-two-moons-by-Sharon-Creech-Student-packet-Novel-units-Novel-units-by-Novel-Units-Inc-.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a03a04a05a08a01/The-Whole-Way-Home-by-Sarah-Creech.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a03a04a01a09/The-Sleep-of-Reason-by-Morri-Creech.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a06a02a09a02a03/Sharon-s-Wicked-Awesome-Blog-Book-by-Sharon-Desruisseaux.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a03a06a07a05a03/Virgil-Creech-Takes-a-Swipe-at-Redemption-by-Mark-Myers.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a06a03a06a04a04/I-m-Just-Like-You-by-Sharon-Cramer.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a03a07a04a03a05/Tomorrow-Log-by-Sharon-Lee.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a02a07a04a07a07/The-Tomorrow-Log-by-Sharon-Lee.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a05a00a01a09a03/Everything-After-by-Sharon-Pywell.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a07a01a07a05a08/Welcome-to-Sharonville-by-Sharon-Zink.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a08a01a01a02a06/Selma-by-Sharon-J-Jackson.pdfIn PDF document text

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