Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1a1022a18fa584…

MALICIOUS

PDF

18.4 KB Created: 2019-05-07 09:46:52 +01:00 Authoring application: mPDF 5.7
MD5: 1e6f8fea257dcb41fe335d2529d9bf5d SHA-1: 1262f8979a6ccbdcb315d61295ff809cd9eeae4c SHA-256: 0f1a1022a18fa584a75f7931dc4167102e0d105ed2a5cd1d5fb0bf93ef6d9fe5
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. While many of these links point to benign-looking book titles, the sheer volume and the use of a dynamic DNS hostname suggest a potential attempt to manipulate search engine results or to host malicious content disguised as legitimate documents. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/1090094092099098091/The-Insight-And-The-Outsight-Images-of-America-of-the-Authors-Paul-Watzlawick-and-Bill-Bryson-by-Jennifer-Dacquxe9.pdf
    • http://loaminoo.linkpc.net/1099090093090095/Made-In-America-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/3093094092090099/One-Summer-America-1927-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/3090090093093091/the-lost-continent-travels-in-small-town-america-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/4094094098097093/Made-in-America-An-Informal-History-of-the-English-Language-in-the-United-States-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/9090093098090091/I-m-a-Stranger-Here-Myself-Notes-on-Returning-to-America-After-Twenty-Years-Away-Unabridged-Audible-Audio-Edition-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/2093098097098093/Bryson-s-Dictionary-of-Troublesome-Words-A-Writer-s-Guide-to-Getting-It-Right-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/2098093090090099/Bryson-s-Dictionary-for-Writers-and-Editors-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/1090096094091097/Declaration-of-Independence-Constitution-of-the-United-States-of-America-Bill-of-Rights-and-Constitutional-Amendments-Including-Images-of-Original-by-Founding-Fathers.pdf
    • http://loaminoo.linkpc.net/1090094092098093092/No-es-posible-no-comunicar-by-Paul-Watzlawick.pdf
    • http://loaminoo.linkpc.net/3095093092091094/Shakespeare-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/3090099093096/One-Summer-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/5090090099097095/The-Lost-Continent-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/1091091090092095091/Terug-in-Amerika-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/9090092097095096/A-Short-History-of-Nearly-Everything-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/2096096093098097/In-a-Sunburned-Country-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/4090092099094091/A-Walk-in-the-Woods-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/4093095098094099/Icons-of-England-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/3092097093093/A-Walk-in-the-Woods-by-Bill-Bryson.pdf
    • http://loaminoo.linkpc.net/7091094096091097/The-Lost-Continent-amp-Neither-Here-Nor-There-by-Bill-Bryson.pdf

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