Malicious PDF — malware analysis report

Static analysis result for SHA-256 49cdaef89c252d4c…

MALICIOUS

PDF

16.4 KB Created: 2019-04-30 03:34:00 +01:00 Authoring application: mPDF 5.7
MD5: 0e1e6c18acb81210aba766d98b944033 SHA-1: 58349da77d56d5f81a564b05d0e0b49770ab7ac1 SHA-256: 49cdaef89c252d4cd96d5b53607c3f2469f6455764edbab65ee0a1643f802132
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs pointing to what appears to be a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. While the URLs themselves are marked as benign, the sheer volume and structure suggest a malicious intent, likely to manipulate search engine results or distribute further malicious content. No scripts were extracted from this sample.

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/2096096091093090/Taken-at-the-Flood-Hercule-Poirot-28-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/7096092091091090/Surprise-Endings-by-Hercule-Poirot-The-A-B-C-Murders-Murder-in-Three-Acts-Cards-on-the-Table-Hercule-Poirot-11-13-15-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/7096092091091097/Clues-to-Christie-The-Definitive-Guide-to-Miss-Marple-Hercule-Poirot-Tommy-amp-Tuppence-and-All-of-Agatha-Christie-s-Mysteries-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/3099094096093098/Poirot-s-Early-Cases-Hercule-Poirot-41-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/3091096099095095/Poirot-Investigates-Hercule-Poirot-3-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/7096091098098099/The-Under-Dog-Hercule-Poirot-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/3093097093098094/After-the-Funeral-Hercule-Poirot-31-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/3092095091099099/Three-Act-Tragedy-Hercule-Poirot-11-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/4096092098092094/The-Clocks-Hercule-Poirot-37-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/3095092098092097/Evil-Under-the-Sun-Hercule-Poirot-24-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/7092099091098/Hercule-Poirot-s-Christmas-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/3094098098095097/The-ABC-Murders-Hercule-Poirot-13-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/5099091098098/Three-Act-Tragedy-Hercule-Poirot-11-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/1090094090093093096/Tod-in-den-Wolken-Hercule-Poirot-12-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/7096092091092092/Hercule-Poirot-Gift-Set-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/7096092091092091/Hercule-Poirot-Boxed-Set-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/4090092095095/After-the-Funeral-Hercule-Poirot-31-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/4098093095092092/Murder-in-the-Mews-Hercule-Poirot-18-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/7096092091091091/Hercule-Poirot-s-Greatest-Cases-by-Agatha-Christie.pdf
    • http://loaminoo.linkpc.net/4090097090099097/The-Labours-Of-Hercules-Hercule-Poirot-26-by-Agatha-Christie.pdf

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