Malicious PDF — malware analysis report

Static analysis result for SHA-256 63878a6de05f000a…

MALICIOUS

PDF

16.5 KB Created: 2019-04-30 05:02:31 +01:00 Authoring application: mPDF 5.7
MD5: 2172e456bad7088b37c523181109db4f SHA-1: 49210b5746edfb7739d1fc156ef0a10e760d55cd SHA-256: 63878a6de05f000a3a7b493df1ded29be2bdfff8fc19084c3833f2707740fe12
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a link farm, which is a common technique for SEO poisoning or distributing malicious content. While no scripts were explicitly extracted, the PDF structure and the heuristic firings suggest an attempt to redirect users to potentially harmful external resources. The ML classifier also flagged this PDF as malicious with high confidence.

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://xiixmcuin.linkpc.net/4200209205205/John-Green-the-Collection-Looking-for-Alaska-An-Abundance-of-Katherines-Paper-Towns-Will-Grayson-Will-Grayson-The-Fault-in-Our-Stars-by-John-Green.pdf
    • http://xiixmcuin.linkpc.net/2202204201203206/Fout-in-de-koude-oorlog-by-Martin-Bossenbroek.pdf
    • http://xiixmcuin.linkpc.net/3201200202202208/Green-Smoothie-Everyday-Green-Smoothie-For-Beginners-10-Day-Green-Smoothie-Cleanse-green-smoothies-green-smoothies-detox-green-smoothies-recipes-green-Diet-healthy-food-for-everyday-Book-9-by-Anna-Scott.pdf
    • http://xiixmcuin.linkpc.net/6207205209200202/Frankenstein-by-John--Green.pdf
    • http://xiixmcuin.linkpc.net/4205208202/Let-it-Snow-by-John-Green.pdf
    • http://xiixmcuin.linkpc.net/2207202201209205/Looking-for-Alaska-by-John-Green.pdf
    • http://xiixmcuin.linkpc.net/8209203203201205/Looking-for-Alaska-by-John-Green.pdf
    • http://xiixmcuin.linkpc.net/1204201203203203/Let-It-Snow-by-John-Green.pdf
    • http://xiixmcuin.linkpc.net/3206205202204201/Let-It-Snow-by-John-Green.pdf
    • http://xiixmcuin.linkpc.net/2204209203200201/An-Abundance-of-Katherines-by-John-Green.pdf
    • http://xiixmcuin.linkpc.net/9206201207/The-Fault-in-Our-Stars-by-John-Green.pdf
    • http://xiixmcuin.linkpc.net/8206200209207/The-Fault-in-Our-Stars-by-John-Green.pdf
    • http://xiixmcuin.linkpc.net/1204200203208201/Green-Soldiers-by-John-Bensko.pdf
    • http://xiixmcuin.linkpc.net/1200207200204204/Paper-Towns-by-John-Green.pdf
    • http://xiixmcuin.linkpc.net/1201200200202203204/Krive-so-zvezde-by-John-Green.pdf
    • http://xiixmcuin.linkpc.net/7201205201204208/The-Fault-in-Our-Stars-by-John-Green.pdf
    • http://xiixmcuin.linkpc.net/4200208202200201/Paper-Towns-by-John-Green.pdf
    • http://xiixmcuin.linkpc.net/1201207201207207/Fried-Green-Zombies-by-John-A-Allen.pdf
    • http://xiixmcuin.linkpc.net/6205204203205200/Telly-the-Kelly-Green-Tiger-by-John-Majeski.pdf
    • http://xiixmcuin.linkpc.net/3200208206207/The-Green-Ripper-Travis-McGee-18-by-John-D-MacDonald.pdf

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