Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6ed9e7fd055330…

MALICIOUS

PDF

13.8 KB Created: 2019-05-02 06:25:53 +01:00 Authoring application: mPDF 5.7
MD5: fdb9354a15f796d5dc7afdfdc1421e49 SHA-1: 73aa87bb9db06f9f1d0419f35ec58d305cc40789 SHA-256: 5b6ed9e7fd05533035dfd16dcdfaed258378e0cfc6130db39612e3463ab7773f
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, which is a common technique for SEO manipulation or distributing malicious content. While no scripts were explicitly extracted, the PDF structure and the heuristic firings suggest an attempt to redirect users to external sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/4099097096090090/Gone-to-the-Country-The-New-Lost-City-Ramblers-and-the-Folk-Music-Revival-by-Ray-Allen.pdf
    • http://loaminoo.linkpc.net/2099095098093094/Folk-Medicine-by-D-C-Jarvis.pdf
    • http://loaminoo.linkpc.net/2096096095094096/The-Souls-of-Black-Folk-by-W-E-B-Du-Bois.pdf
    • http://loaminoo.linkpc.net/4095093098098092/In-the-Seam-by-Kirk-James-Folk.pdf
    • http://loaminoo.linkpc.net/4095095092098099/The-Souls-of-Black-Folk-by-W-E-B-Du-Bois.pdf
    • http://loaminoo.linkpc.net/3096098093095096/The-Hive-Folk-by-Jerome-Brooke.pdf
    • http://loaminoo.linkpc.net/3090092096096098/The-Folk-Keeper-by-Franny-Billingsley.pdf
    • http://loaminoo.linkpc.net/9092091092098097/Okrutny-ksi-The-Folk-of-the-Air-1-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/1090092093091095091/Manifest-for-folk-flest-by-Johan-Harstad.pdf
    • http://loaminoo.linkpc.net/2099094099093094/The-Souls-of-Yellow-Folk-by-Wesley-Yang.pdf
    • http://loaminoo.linkpc.net/4091095093094097/The-Karma-Of-Brown-Folk-by-Vijay-Prashad.pdf
    • http://loaminoo.linkpc.net/2094093099095099/Timothy-And-The-Forest-Folk-by-Marilyn-Nickson.pdf
    • http://loaminoo.linkpc.net/4093090092095095/Collected-Folk-Tales-by-Alan-Garner.pdf
    • http://loaminoo.linkpc.net/3091093092098098/Folk-Tales-of-England-by-Jean-Corcoran.pdf
    • http://loaminoo.linkpc.net/4090092093094094/The-Midnight-Folk-and-The-Box-of-Delights-by-John-Masefield.pdf
    • http://loaminoo.linkpc.net/4096099091092090/The-Woodland-Folk-in-Dragonland-by-Tony-Wolf.pdf
    • http://loaminoo.linkpc.net/1092094094092096/Church-Folk-by-Michele-Andrea-Bowen.pdf
    • http://loaminoo.linkpc.net/2098097098091091/Valley-So-Wild-A-Folk-History-by-Carson-Brewer.pdf
    • http://loaminoo.linkpc.net/1090093091095099098/Philippine-Folk-Tales-by-Mabel-Cook-Cole.pdf
    • http://loaminoo.linkpc.net/2090095090095097/Tibetan-Folk-Tales-by-Frederick-Hyde-Chambers.pdf

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