Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c6fc70465d380b…

MALICIOUS

PDF

15.6 KB Created: 2019-04-30 02:43:34 +01:00 Authoring application: mPDF 5.7
MD5: d4011a8f5615709ecb4d01b79a371014 SHA-1: ff4361f9edb220f820f7eda97728cb491d688521 SHA-256: a5c6fc70465d380b8d01d632ee0fdbbfe199e92120b7add8d2a773fc3eaf2e52
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs, identified as a link farm. While the URLs themselves are currently classified as benign, the sheer volume and structure suggest a malicious intent, likely for SEO poisoning or to distribute further malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

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://loaminoo.linkpc.net/1091097096090093098/President-Down-Troy-Barclay-Amber-Neilson-2-by-Daniel-Adams.pdf
    • http://loaminoo.linkpc.net/1090098092095091090/John-Adams-2nd-President-of-the-United-States-by-Heidi-Elston.pdf
    • http://loaminoo.linkpc.net/5099094093099098/Zombie-President-by-Daniel-Cubias.pdf
    • http://loaminoo.linkpc.net/1091097096091092092/A-Barclay-Prayer-Book-by-William-Barclay.pdf
    • http://loaminoo.linkpc.net/4096091094097090/The-Exodus-Quest-Daniel-Knox-2-by-Will-Adams.pdf
    • http://loaminoo.linkpc.net/1091097096090093095/William-Barclay-A-Spiritual-Autobiography-by-William-Barclay.pdf
    • http://loaminoo.linkpc.net/5093092095096094/Roger-Zelazny-s-To-Rule-in-Amber-The-Dawn-of-Amber-3-by-John-Gregory-Betancourt.pdf
    • http://loaminoo.linkpc.net/1091099097098093095/The-Turning-by-Micky-Neilson.pdf
    • http://loaminoo.linkpc.net/1094092091096098/Even-Mississippi-by-Melany-Neilson.pdf
    • http://loaminoo.linkpc.net/1091099097098090092/The-War-of-the-Shifting-Sands-by-Micky-Neilson.pdf
    • http://loaminoo.linkpc.net/1091099097098090093/Diablo-III-Morbed-by-Micky-Neilson.pdf
    • http://loaminoo.linkpc.net/1091099097097099093/Overwatch-6-Destroyer-by-Micky-Neilson.pdf
    • http://loaminoo.linkpc.net/5098098091094092/Mind-of-a-Savant-by-Neilson-Voyne-Smith.pdf
    • http://loaminoo.linkpc.net/4092090090092/Nathaniel-s-1st-Adventure-Cosmic-Aviators-1-by-G-E-F-Neilson.pdf
    • http://loaminoo.linkpc.net/1094094090099099/Mr-Adams-s-Last-Crusade-The-Extraordinary-Post-presidential-Life-of-John-Quincy-Adams-by-Joseph-Wheelan.pdf
    • http://loaminoo.linkpc.net/1091099097098094095/Lost-and-Found-An-Autobiography-About-Discovering-Family-by-Micky-Neilson.pdf
    • http://loaminoo.linkpc.net/1091099097097099095/Diablo-III-Heroes-Rise-Darkness-Falls-by-Micky-Neilson.pdf
    • http://loaminoo.linkpc.net/1091099097098091097/The-President-s-Daughter-The-President-s-Daughter-1-by-Micky-O-39-Brady.pdf
    • http://loaminoo.linkpc.net/1090090090094093090/Milton-s-Minor-Poems-L-Allegro-Il-Penseroso-Comus-and-Lycidas-by-William-Allan-Neilson.pdf
    • http://loaminoo.linkpc.net/1091097096091091098/Barclay-Butera-by-Barclay-Butera.pdf
    • http://loaminoo.linkpc.net/1091099097097099093/Overwatch-6-Des

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