Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bfcca4af875bb81…

MALICIOUS

PDF

17.1 KB Created: 2019-04-30 05:13:58 +01:00 Authoring application: mPDF 5.7
MD5: f898bdd95d1adc8d10acd566a630c0b1 SHA-1: 2d2d4c41f3bd5b67f1c11f88005d3cd82308a930 SHA-256: 6bfcca4af875bb812648c1ec47d94d6def2afde6a11073da541852a3987eb6a7
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified as a link farm, which is a common tactic for SEO manipulation or distributing malicious content. The ML classifier also flagged this PDF as malicious. While the URLs themselves are currently marked as benign, the sheer volume and the heuristic firing suggest a malicious intent, likely to direct users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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/4094098099090095/Eight-Little-Piggies-Reflections-in-Natural-History-by-Stephen-Jay-Gould.pdf
    • http://loaminoo.linkpc.net/3094091095093096/The-Flamingo-s-Smile-Reflections-in-Natural-History-by-Stephen-Jay-Gould.pdf
    • http://loaminoo.linkpc.net/2093098096098091/Leonardo-s-Mountain-of-Clams-and-the-Diet-of-Worms-Essays-on-Natural-History-by-Stephen-Jay-Gould.pdf
    • http://loaminoo.linkpc.net/2093095099094/Wonderful-Life-The-Burgess-Shale-and-the-Nature-of-History-by-Stephen-Jay-Gould.pdf
    • http://loaminoo.linkpc.net/2095094092092094/Stuffed-Animals-and-Pickled-Heads-The-Culture-and-Evolution-of-Natural-History-Museums-by-Stephen-T-Asma.pdf
    • http://loaminoo.linkpc.net/8095099093096093/Stephen-J-Gould-and-Immanuel-Velikovsky-by-Charles-Ginenthal.pdf
    • http://loaminoo.linkpc.net/1090095092092098/Dialogues-Concerning-Natural-Religion-and-The-Natural-History-of-Religion-by-David-Hume.pdf
    • http://loaminoo.linkpc.net/4095095091091/Wild-Rice-Cooking-History-Natural-History-Harvesting-and-Lore-by-Susan-Carol-Hauser.pdf
    • http://loaminoo.linkpc.net/4099096095098094/Stephen-Fry-s-Incomplete-and-Utter-History-of-Classical-Music-by-Stephen-Fry.pdf
    • http://loaminoo.linkpc.net/3099094094091094/Reflections-on-a-Gift-of-Watermelon-Pickle-And-Other-Modern-Verse-by-Stephen-Dunning.pdf
    • http://loaminoo.linkpc.net/8093094091094/Chester-Gould-A-Daughter-s-Biography-of-the-Creator-of-quot-Dick-Tracy-quot-by-Jean-Gould-O-39-connell.pdf
    • http://loaminoo.linkpc.net/1091094097096091/Natural-History-by-Dan-Chiasson.pdf
    • http://loaminoo.linkpc.net/2095090096097090/Why-We-Run-A-Natural-History-by-Bernd-Heinrich.pdf
    • http://loaminoo.linkpc.net/8098098095096093/Why-We-Run-A-Natural-History-by-Bernd-Heinrich.pdf
    • http://loaminoo.linkpc.net/3099096090098091/Natural-History-A-Selection-by-Pliny-the-Elder.pdf
    • http://loaminoo.linkpc.net/9098098095092098/From-The-Natural-History-of-a-Passion-by-Alfredo-Todisco.pdf
    • http://loaminoo.linkpc.net/1099093099090096/A-Natural-History-of-the-Senses-by-Diane-Ackerman.pdf
    • http://loaminoo.linkpc.net/6099097095095098/Walking-with-Dinosaurs-A-Natural-History-by-Tim-Haines.pdf
    • http://loaminoo.linkpc.net/6099090092097093/The-Natural-History-of-Unicorns-by-Chris-Lavers.pdf
    • http://loaminoo.linkpc.net/5095097090098096/Vestiges-of-the-Natural-History-of-Creation-by-Robert-Chambers.pdf