Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c24987a8493e78…

MALICIOUS

PDF

31.7 KB Created: 2019-05-02 10:31:01 +01:00 Authoring application: mPDF 5.7 First seen: 2021-10-12
MD5: b77e2297d34b841850a19e88891c289c SHA-1: b388c24da7833ef9b9f74165f9c201fc7513a51d SHA-256: b8c24987a8493e78341ac5ae8789cb2c17445bcbd54b94a0c5753aefec5d6eb0
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, identified as a link farm. While the document body is heavily obfuscated, the presence of numerous external links suggests an attempt to manipulate search engine results or redirect users to malicious content. The ML classifier also flagged this PDF as malicious, supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9670

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/5a08a08a04a08a06/Russ-Columbo-The-Amazing-Life-And-Mysterious-Death-Of-A-Hollywood-Singing-Legend-by-Lou-Miano.pdf In PDF document text
    • http://muicuiu.dumb1.com/1a00a01a05a04a09/Behold-the-King-of-Glory-A-Narrative-of-the-Life-Death-and-Resurrection-of-Jesus-Christ-by-Russ-Ramsey.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a06a05a02a03a08/Cocaine-Cowgirl-The-Outrageous-Life-and-Mysterious-Death-of-Griselda-Blanco-by-Jennie-Erin-Smith.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a02a01a06a04a09/Stuntman-My-Car-Crashing-Plane-Jumping-Bone-Breaking-Death-Defying-Hollywood-Life-by-Hal-Needham.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a04a02a05a03/Fatal-Mountaineer-The-High-Altitude-Life-and-Death-of-Willi-Unsoeld-American-Himalayan-Legend-by-Robert-Roper.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a02a00a06a01/The-Kiss-of-Death-My-Swordhand-is-Singing-2-by-Marcus-Sedgwick.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a07a00a06a03a07/Articles-on-in-Death-Novel-Series-Including-In-Death-Eve-Dallas-Naked-in-Death-Roarke-in-Death-Characters-Glory-in-Death-Immortal-in-Death-Vengeance-in-Death-in-Death-Technology-Origin-in-Death-Memory-in-Death-Novel-by-Hephaestus-Books.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a04a02a03a03a05/To-Darkness-and-to-Death-A-Rev-Clare-Fergusson-Russ-Van-Alstyne-Mystery-4-by-Julia-Spencer-Fleming.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a03a02a03a01a01/A-Belfast-Girl-A-1960s-American-folk-music-legend-weaves-stories-of-a-girlhood-on-the-singing-streets-of-Ireland-marriage-in-Scotland-and-arrival-in-America-by-Maggi-Kerr-Peirce.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a07a06a07a08/Secrets-of-My-Hollywood-Life-Secrets-of-My-Hollywood-Life-1-by-Jen-Calonita.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a02a06a05a01a04/Encyclopedia-of-the-End-Mysterious-Death-in-Fact-Fancy-Folklore-and-More-by-Deborah-Noyes.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a03a07a04a00/Tarzan-The-Complete-Russ-Manning-Newspaper-Strips-Volume-1-1967-1969-by-Russ-Manning.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a06a06a06a04a01/Death-An-Exploration-Learning-To-Embrace-Life-s-Most-Feared-Mystery-Death-Dying-Grieving-Grief-Mortality-Loss-Coping-with-Death-Book-1-by-Loren-Mayshark.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a09a09a07a07a06/Kid-Carolina-R-J-Reynolds-Jr-a-Tobacco-Fortune-and-the-Mysterious-Death-of-a-Southern-Icon-by-Heidi-Schnakenberg.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a03a05a07a01a05/Quotes-That-Will-Change-Your-Life-A-Curated-Collection-of-Mind-Blowing-Wisdom-by-Russ-Kick.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a04a05a07a05a01/How-Adam-Smith-Can-Change-Your-Life-An-Unexpected-Guide-to-Human-Nature-and-Happiness-by-Russ-Roberts.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a02a05a08a08a04/The-Amazing-and-Death-Defying-Diary-of-Eugene-Dingman-by-Paul-Zindel.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a05a08a02a02a02/So-That-Happened-My-Unexpected-Life-in-Hollywood-by-Jon-Cryer.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a00a06a02a03a08/Mysterious-Wisdom-The-Life-and-Work-of-Samuel-Palmer-by-Rachel-Campbell-Johnston.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a08a04a01a09a00/The-Men-with-the-Pink-Triangle-The-True-Life-and-Death-Story-of-Homosexuals-in-the-Nazi-Death-Camps-by-Heinz-Heger.pdfIn PDF document text

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