Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75eac8c9fb4c1e0…

MALICIOUS

PDF

15.6 KB Created: 2019-04-30 03:42:54 +01:00 Authoring application: mPDF 5.7
MD5: ebf6fc900165e519c3cc586bada9b9d3 SHA-1: 831795fcffcf1dd30f62d764b231834b0cf2c319 SHA-256: a75eac8c9fb4c1e073776dcab8ee45cae3201194536e81572ba4ebfe9892be85
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a 'PDF_SEO_LINK_FARM' heuristic. While the URLs themselves are marked as benign, the sheer volume and structure suggest an attempt to manipulate search engine results or distribute content through a link farm. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific intent beyond the link farm.

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/1092094094094090/High-Cotton-Maafa-by-P-J-Dunn.pdf
    • http://loaminoo.linkpc.net/3098099091092090/High-Cotton-Bucklin-Family-Reunion-1-by-Debby-Mayne.pdf
    • http://loaminoo.linkpc.net/1090098097098092098/Jerry-Cotton-Sonder-Edition---Folge-001-Ein-teuflischer-Plan-by-Jerry-Cotton.pdf
    • http://loaminoo.linkpc.net/1090094090097097095/Jerry-Cotton---Folge-3005-Der-Tod-stellt-viele-Fragen-by-Jerry-Cotton.pdf
    • http://loaminoo.linkpc.net/1091094095099091092/Jerry-Cotton---Folge-2850-Liebe-ist-ein-hartes-Gesch-ft-by-Jerry-Cotton.pdf
    • http://loaminoo.linkpc.net/1090097091094094097/Jerry-Cotton---Folge-2958-Am-Ziel-wartet-der-Tod-by-Jerry-Cotton.pdf
    • http://loaminoo.linkpc.net/9092098091094091/Jerry-Cotton---Folge-2171-Das-L-cheln-der-Tigerin-by-Jerry-Cotton.pdf
    • http://loaminoo.linkpc.net/1090092090091095092/Jerry-Cotton---Folge-2908-Die-Fackel-der-Vergeltung-by-Jerry-Cotton.pdf
    • http://loaminoo.linkpc.net/1091091090096096098/Jerry-Cotton---Folge-2826-Bomben-in-Manhattan-by-Jerry-Cotton.pdf
    • http://loaminoo.linkpc.net/8099093097093091/Jerry-Cotton---Folge-2884-Im-Netz-der-Spinne-by-Jerry-Cotton.pdf
    • http://loaminoo.linkpc.net/3091090094098099/Gone-on-Sunday-A-Cotton-Lee-Penn-Historical-Mystery-Cotton-Lee-Penn-Historical-Mysteries-Book-1-by-Tower-Lowe.pdf
    • http://loaminoo.linkpc.net/5092098094096092/Danny-Dunn-and-the-Smallifying-Machine-Danny-Dunn-11-by-Jay-Williams.pdf
    • http://loaminoo.linkpc.net/5092098095090099/Danny-Dunn-Scientific-Detective-Danny-Dunn-14-by-Jay-Williams.pdf
    • http://loaminoo.linkpc.net/1094097095096097/Danny-Dunn-and-the-Homework-Machine-Danny-Dunn-3-by-Jay-Williams.pdf
    • http://loaminoo.linkpc.net/5092098095090096/Danny-Dunn-and-the-Heat-Ray-Danny-Dunn-7-by-Jay-Williams.pdf
    • http://loaminoo.linkpc.net/3093091095091093/Mistress-and-Commander-High-Jinks-High-Seas-and-Highlanders-by-Amelia-Dalton.pdf
    • http://loaminoo.linkpc.net/4093097097097094/All-s-Fair-in-Love-War-and-High-School-Pullman-High-2-by-Janette-Rallison.pdf
    • http://loaminoo.linkpc.net/1090099099096094094/High-Jinks-in-High-Places-by-Ruth-Barrett.pdf
    • http://loaminoo.linkpc.net/3097095093096090/The-Cotton-Pickers-by-B-Traven.pdf
    • http://loaminoo.linkpc.net/3095094096097092/Boundless-by-Brad-Cotton.pdf
    • http://loaminoo.linkpc.net/3091090094098099/Gone-on-Sunday-A-Cotton-Lee-Penn-Historical-Myster