Malicious PDF — malware analysis report

Static analysis result for SHA-256 b38439911ad8710e…

MALICIOUS

PDF

16.6 KB Created: 2019-05-06 17:00:47 +01:00 Authoring application: mPDF 5.7
MD5: 0102db8095f061587862836af5234d6c SHA-1: cd6d703a3d9c724ade186b8508e2594bae10cbd5 SHA-256: b38439911ad8710e1b0fa14fdf2a4f8511cf0d2e8c2e306d18dab21623f4b0d8
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, all hosted on the same domain. This technique is often used for SEO poisoning or to distribute malicious content indirectly. The ML classifier strongly flagged this PDF as malicious, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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/1091092093094094095/Raku-Glass---A-Kiln-Firing-Process-by-Boyce-Lundstrom.pdf
    • http://loaminoo.linkpc.net/1093099093097092/The-Kiln-by-William-McIlvanney.pdf
    • http://loaminoo.linkpc.net/4092093091091092/Firing-Line-by-Richard-Holmes.pdf
    • http://loaminoo.linkpc.net/4095091098091094/A-Firing-Offense-by-George-Pelecanos.pdf
    • http://loaminoo.linkpc.net/1090094098096091090/Memoirs-Sixty-Years-on-the-Firing-Line-by-Arthur-Krock.pdf
    • http://loaminoo.linkpc.net/1090090092099092/Firing-Heather-The-Life-and-Times-of-Nellie-McClung-by-Mary-E-Hallett.pdf
    • http://loaminoo.linkpc.net/1091092093095090096/The-Phantom-1703-The-Immortal-by-Janne-Lundstr-m.pdf
    • http://loaminoo.linkpc.net/1091092093094099097/Certain-Hope-for-Uncertain-Times-by-Lowell-Lundstrom.pdf
    • http://loaminoo.linkpc.net/1091092093093097097/What-to-Do-When-You-Can-t-Decide-Useful-Tools-for-Finding-the-Answers-Within-by-Meg-Lundstrom.pdf
    • http://loaminoo.linkpc.net/1091092093094095094/Near-Equilibrium-Transport-Fundamentals-and-Applications-by-Mark-Lundstrom.pdf
    • http://loaminoo.linkpc.net/1091092093093098095/One-Drop-in-a-Sea-of-Blue-The-Liberators-of-the-Ninth-Minnesota-by-John-B-Lundstrom.pdf
    • http://loaminoo.linkpc.net/1090092092096099096/Der-Alte-Palast-in-Assur-Architektur-Und-Baugeschichte-by-Steven-Lundstrom.pdf
    • http://loaminoo.linkpc.net/6097095099094/Girl-Under-Glass-Glass-and-Iron-1-by-Monica-Enderle-Pierce.pdf
    • http://loaminoo.linkpc.net/1091092093094095090/Nanoscale-Transistors-Device-Physics-Modeling-and-Simulation-by-Mark-Lundstrom.pdf
    • http://loaminoo.linkpc.net/4094093098094094/Shards-of-Glass-The-Glass-Trilogy-1-by-Arianne-Richmonde.pdf
    • http://loaminoo.linkpc.net/1091092093096093091/The-Making-of-Resistance-Brazil-s-Landless-Movement-and-Narrative-Enactment-by-Markus-Lundstrom.pdf
    • http://loaminoo.linkpc.net/1091092093093097096/The-First-Team-Pacific-Naval-Air-Combat-from-Pearl-Harbor-to-Midway-by-John-B-Lundstrom.pdf
    • http://loaminoo.linkpc.net/1099092091091097/Once-a-Duchess-by-Elizabeth-Boyce.pdf
    • http://loaminoo.linkpc.net/2097092097095096/The-Herbalist-by-Niamh-Boyce.pdf
    • http://loaminoo.linkpc.net/4094092099098092/Okay-Okay-by-Melinda-Tracy-Boyce.pdf
    • http://loaminoo.linkpc.net/1091092093094095094/Near-Equilib

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