Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d0d800645c8721…

MALICIOUS

PDF

13.3 KB Created: 2019-05-07 03:24:34 +01:00 Authoring application: mPDF 5.7
MD5: ad50fc3e03845fed47f52ab63c7e7907 SHA-1: b4e26b10aafa8a1242dfb47b6e70838ae38f6ac9 SHA-256: e4d0d800645c872162d8cb795097ed15a7295df5da718398a3bfcf670621af1b
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on 'loaminoo.linkpc.net'. While the individual linked PDFs are marked as benign, the sheer volume and the nature of the hosting suggest a link farm or distribution mechanism. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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/3098093090/They-All-Saw-a-Cat-by-Brendan-Wenzel.pdf
    • http://loaminoo.linkpc.net/1090098094096092/End-Game-by-Tabatha-Wenzel.pdf
    • http://loaminoo.linkpc.net/8091094097099096/Divertissement-For-Oboe-And-Orchestra-Op-58-by-Johann-Wenzel-Kalliwoda.pdf
    • http://loaminoo.linkpc.net/1090094091098091095/Clinical-Relevance-of-Hemostaseological-Findings-Abstracts-by-E-Wenzel.pdf
    • http://loaminoo.linkpc.net/1091097099093097097/Earth-System-Analysis-Integrating-Science-for-Sustainability-by-Volker-Wenzel.pdf
    • http://loaminoo.linkpc.net/1090093094095092091/Leckere-Kuchen-und-Torten-20-einfache-und-schnelle-Rezepte-by-Jasmin-Petra-Wenzel.pdf
    • http://loaminoo.linkpc.net/9092096099099095/Kurt-Schwitters-Catalogue-Raisonne-Volume-3-1937-1948-by-Kurt-Schwitters.pdf
    • http://loaminoo.linkpc.net/9092098094090096/Building-the-Monkey-House-At-Kurt-Vonnegut-s-Writing-Table-by-Kurt-Vonnegut.pdf
    • http://loaminoo.linkpc.net/9092097090094090/Kurt-Schwitters-Catalogue-Raisonn-Vol-2-1923-1936-by-Kurt-Schwitters.pdf
    • http://loaminoo.linkpc.net/9092096099098094/Kurt-Schwitters-Merz-A-Total-Vision-Of-The-World-by-Kurt-Schwitters.pdf
    • http://loaminoo.linkpc.net/4090095099092096/Exposure-by-Ava-Marsh.pdf
    • http://loaminoo.linkpc.net/1096090099096093/Exposure-by-Elizabeth-Lister.pdf
    • http://loaminoo.linkpc.net/2098099095097094/Fatal-Exposure-by-Lia-Slater.pdf
    • http://loaminoo.linkpc.net/9094094097099/Indecent-Exposure-by-Tom-Sharpe.pdf
    • http://loaminoo.linkpc.net/3095096095091092/Double-Exposure-by-Sam-Kadence.pdf
    • http://loaminoo.linkpc.net/1097094090097094/Tropical-Exposure-by-Wynter-Daniels.pdf
    • http://loaminoo.linkpc.net/1092098099096092/Double-Exposure-by-Michael-Lister.pdf
    • http://loaminoo.linkpc.net/1097091091094092/Intimate-Exposure-by-Portia-Da-Costa.pdf
    • http://loaminoo.linkpc.net/2091096090097096/Exposure-by-James-Lockhart-Perry.pdf
    • http://loaminoo.linkpc.net/2095098094097091/Double-Exposure-by-Charmaine-Ross.pdf

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