Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dbfaaca4583119b…

MALICIOUS

PDF

16.1 KB Created: 2019-05-07 05:00:21 +01:00 Authoring application: mPDF 5.7
MD5: 12562d3c6f001fadf9d21bbfff58317e SHA-1: 45edf1519270f309c3adf3f94cc0ef37c9f1a2e5 SHA-256: 5dbfaaca4583119b22e90714a9af8b4c1b3fa2d132359e8d3a2bbf2fb6f65584
92 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. The ML classifier also flagged the document as malicious. While the URLs themselves are marked as benign, the sheer volume and the heuristic firing suggest an attempt to manipulate search engine results or redirect users to potentially malicious content hosted on these domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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/3098091093091095/Silent-Echo-by-J-R-Rain.pdf
    • http://loaminoo.linkpc.net/8094092092091099/Silent-Echo-by-J-R-Rain.pdf
    • http://loaminoo.linkpc.net/1090098095096093/Silent-Echo-by-Elisa-Freilich.pdf
    • http://loaminoo.linkpc.net/4097095099090091/Silent-Echo-by-Elisa-Freilich.pdf
    • http://loaminoo.linkpc.net/1091098091093093097/Amazon-Echo-Amazon-Echo-Advanced-User-Guide-2016-Updated-Echo-Amazon-Echo-User-Manual-Amazon-Alexa-Amazon-Echo-Dot-Amazon-Echo-ebook-by-Jamy-Jackson.pdf
    • http://loaminoo.linkpc.net/1091098091093097090/Amazon-Dot-Newbie-to-Expert-in-60-Minutes-on-Amazon-Dot-2nd-Generation-Echo-Amazon-Echo-User-Manual-Amazon-Alexa-Amazon-Echo-Dot-Amazon-Echo-ebook-Book-3-by-Jamy-Jackson.pdf
    • http://loaminoo.linkpc.net/8091091097098092/Echo-Echo-Reverso-Poems-About-Greek-Myths-by-Marilyn-Singer.pdf
    • http://loaminoo.linkpc.net/9092090090091093/Echo-of-Danger-Echo-Falls-1-by-Marta-Perry.pdf
    • http://loaminoo.linkpc.net/9092090090097093/Echo-Desert-Run-Echo-3-by-Terry-Moore.pdf
    • http://loaminoo.linkpc.net/3098091094097090/Christmas-Kisses-An-Echo-Ridge-Anthology-Echo-Ridge-1-by-Cami-Checketts.pdf
    • http://loaminoo.linkpc.net/2093093095093091/Resonance-An-Echo-Trilogy-Novella-Echo-Trilogy-1-5-by-Lindsey-Fairleigh.pdf
    • http://loaminoo.linkpc.net/4095090098094092/Silent-Weapon-Silent-Series-1-by-Debra-Webb.pdf
    • http://loaminoo.linkpc.net/8097098093090/Silent-Fall-Silent-2-by-Barbara-Freethy.pdf
    • http://loaminoo.linkpc.net/1097094090097093/Silent-Guilt-Silent-2-by-N-E-Henderson.pdf
    • http://loaminoo.linkpc.net/3099093098096098/Silent-Guilt-Silent-2-by-N-E-Henderson.pdf
    • http://loaminoo.linkpc.net/3096099099092097/Rain-Storm-John-Rain-3-by-Barry-Eisler.pdf
    • http://loaminoo.linkpc.net/2095099091090092/Forever-Rain-Rain-Will-Fall-1-by-Cindy-Lou-Moldovan.pdf
    • http://loaminoo.linkpc.net/1097096091093099/Echo-s-Revenge-Echo-s-Revenge-1-by-Sean-Austin.pdf
    • http://loaminoo.linkpc.net/1090098091096095/Othrinia-s-Rain-Rain-Trilogy-1-by-A-J-Adwen.pdf
    • http://loaminoo.linkpc.net/3091093090091091/Rain-At-Main-Event-by-Rain-Fields.pdf

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