Malicious PDF — malware analysis report

Static analysis result for SHA-256 65771bde0bfb0225…

MALICIOUS

PDF

17.4 KB Created: 2019-04-30 04:30:18 +01:00 Authoring application: mPDF 5.7
MD5: e207b67cb213d6ecca01297f552415f2 SHA-1: a90d34371e18a04c8da19adc5eda69ff03e40b03 SHA-256: 65771bde0bfb0225370db038983d32f373236ac4831d1ed708616dd855042f05
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, and a heuristic for a visual download button lure. While the document body is heavily obfuscated, the presence of numerous links suggests an attempt to redirect the user to external content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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/5a09a05a08a01a02/Oscar-De-Profundis-by-Catherine-Mavrikakis.pdf
    • http://muicuiu.dumb1.com/4a00a00a00a03a02/A-Cannibal-and-Melancholy-Mourning-by-Catherine-Mavrikakis.pdf
    • http://muicuiu.dumb1.com/2a03a03a00a07a03/A-Prospect-of-Flowers-A-Book-About-Wild-Flowers-by-Andrew-Young.pdf
    • http://muicuiu.dumb1.com/5a09a05a08a01a09/Business-Law-and-Practice-by-Alexis-Mavrikakis.pdf
    • http://muicuiu.dumb1.com/5a09a05a08a02a08/Public-Companies-and-Equity-Finance-by-Alexis-Mavrikakis.pdf
    • http://muicuiu.dumb1.com/3a07a02a08a02a01/Spit-and-Passion-by-Cristy-C-Road.pdf
    • http://muicuiu.dumb1.com/1a09a00a00a01a04/Spit-Baths-by-Greg-Downs.pdf
    • http://muicuiu.dumb1.com/2a01a07a08a03a01/Spit-Back-a-Boy-by-Iain-Haley-Pollock.pdf
    • http://muicuiu.dumb1.com/1a00a02a04a05a01/The-True-Story-of-Spit-Mac-Phee-by-James-Aldridge.pdf
    • http://muicuiu.dumb1.com/1a01a03a07a00a04/Barley-Soup-and-Slug-Spit-a-novel-by-Susan-Manzke.pdf
    • http://muicuiu.dumb1.com/7a05a02a00a00a07/Boys-Over-Flowers-Hana-Yori-Dango-Vol-3-Boys-Over-Flowers-3-by-Y-ko-Kamio.pdf
    • http://muicuiu.dumb1.com/7a05a02a00a00a09/Boys-Over-Flowers-Hana-Yori-Dango-Vol-4-Boys-Over-Flowers-4-by-Y-ko-Kamio.pdf
    • http://muicuiu.dumb1.com/7a05a02a01a09a03/Boys-Over-Flowers-Hana-Yori-Dango-Vol-27-Boys-Over-Flowers-27-by-Y-ko-Kamio.pdf
    • http://muicuiu.dumb1.com/7a05a02a00a09a05/Boys-Over-Flowers-Hana-Yori-Dango-Vol-10-Boys-Over-Flowers-10-by-Y-ko-Kamio.pdf
    • http://muicuiu.dumb1.com/7a05a02a01a04a08/Boys-Over-Flowers-Hana-Yori-Dango-Vol-22-Boys-Over-Flowers-22-by-Y-ko-Kamio.pdf
    • http://muicuiu.dumb1.com/7a05a02a00a09a06/Boys-Over-Flowers-Hana-Yori-Dango-Vol-12-Boys-Over-Flowers-12-by-Y-ko-Kamio.pdf
    • http://muicuiu.dumb1.com/7a05a02a01a04a05/Boys-Over-Flowers-Hana-Yori-Dango-Vol-19-Boys-Over-Flowers-19-by-Y-ko-Kamio.pdf
    • http://muicuiu.dumb1.com/2a08a00a02a02a01/Butterflies-Flowers-Vol-1-Butterflies-Flowers-1-by-Yuki-Yoshihara.pdf
    • http://muicuiu.dumb1.com/5a04a07a00a08a00/Shedding-Type-Card-Games-Mao-Asshole-Spit-Shithead-Flinch-Uno-Tien-Len-Big-Two-Daifug-Flaps-Cheat-Dou-Di-Zhu-Phase-10-Bartok-by-Source-Wikipedia.pdf
    • http://muicuiu.dumb1.com/2a00a09a05a07a03/The-Best-of-Catherine-Caffeinated-Caffeine-Infused-Self-Publishing-Advice-by-Catherine-Ryan-Howard.pdf