Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4324f5c95e0b74e…

MALICIOUS

PDF

20.6 KB Created: 2019-04-30 09:03:57 +01:00 Authoring application: mPDF 5.7
MD5: 0b340220a7859c026b9029920a613c6f SHA-1: cb569dc4180660886f1beb1b144b2577fabf7f76 SHA-256: f4324f5c95e0b74e13ee9842ed815216e9f64885920a0b70e2bd65d2720b707b
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links to external PDF documents, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. While the specific intent beyond link distribution is unclear due to the lack of executable scripts or clear document body text, the sheer volume of links suggests a malicious attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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/2092092091097099/Creation-of-the-Gods-Library-of-Chinese-Classics-Chinese-English-4-Volumes-by-Xu-Zhonglin.pdf
    • http://loaminoo.linkpc.net/4099095092098096/Chinese-Gods-An-Introduction-to-Chinese-Folk-Religion-by-Jonathan-Chamberlain.pdf
    • http://loaminoo.linkpc.net/4096092099097094/The-Water-Dragon-A-Chinese-Legend---English-and-Chinese-bilingual-text-by-Li-Jian.pdf
    • http://loaminoo.linkpc.net/1099096097091091/The-Book-of-Chinese-Beliefs-A-Journey-Into-the-Chinese-Inner-World-by-Frena-Bloomfield.pdf
    • http://loaminoo.linkpc.net/8098099093095098/The-Chinese-Mind-Understanding-Traditional-Chinese-Beliefs-and-Their-Influence-on-Contemporary-Culture-by-Boy-Lafayette-de-Mente.pdf
    • http://loaminoo.linkpc.net/9094098092095093/Capturing-Chinese-Stories-Prose-and-Poems-by-Revolutionary-Chinese-Authors-Including-Lu-Xun-Hu-Shi-Zhu-Ziqing-Zhou-Zuoren-and-Lin-Yutang-by-Lu-Xun.pdf
    • http://loaminoo.linkpc.net/9094098092090091/Chinese-Short-Stories-by-Revolutionary-Authors---Read-Chinese-Literature-with-Detailed-Footnotes-Pinyin-Summaries-and-Audio-by-Kevin-John-Nadolny.pdf
    • http://loaminoo.linkpc.net/5091090092099090/Beyond-Silence-Chinese-Canadian-Literature-in-English-by-Lien-Chao.pdf
    • http://loaminoo.linkpc.net/8090090093093091/Book-of-Documents-Shangshu-Bilingual-Edition-Chinese-and-English-Classic-of-History-by-Confucius.pdf
    • http://loaminoo.linkpc.net/5097095097097097/Mandarin-Language-Guide-to-Conversation-in-French-English-and-Chinese-Containing-a-Vocabulary-and-Familiar-Dialogues-by-S-raphin-Couvreur.pdf
    • http://loaminoo.linkpc.net/7091095094099097/Old-Man-and-the-Sea-Chinese-by-Ernest-Hemingway.pdf
    • http://loaminoo.linkpc.net/1097092092093097/Sagwa-the-Chinese-Siamese-Cat-by-Amy-Tan.pdf
    • http://loaminoo.linkpc.net/1097099091092/Sun-Tzu-s-the-Art-of-War-Plus-the-Ancient-Chinese-Revealed-by-Sun-Tzu.pdf
    • http://loaminoo.linkpc.net/5091099095097093/Yan-Kit-s-Classic-Chinese-Cookbook-by-Yan-kit-So.pdf
    • http://loaminoo.linkpc.net/3099099090093096/The-Chinese-Fairy-Book-by-Various.pdf
    • http://loaminoo.linkpc.net/7091095095090098/Sun-Tzu-s-Art-of-War-The-Modern-Chinese-Interpretation-by-Sun-Tzu.pdf
    • http://loaminoo.linkpc.net/1090096090098093/Chinese-Handcuffs-by-Chris-Crutcher.pdf
    • http://loaminoo.linkpc.net/4090090091096099/The-Chinese-Banker-by-Dustin-Hill.pdf
    • http://loaminoo.linkpc.net/6091094090092/Chinese-Whispers-by-Marisa-Mackle.pdf
    • http://loaminoo.linkpc.net/7094093098095090/Chinese-Puzzle-No-Sin-Mysteries-1-by-T-M-Raymond.pdf
    • http://loaminoo.linkpc.net/9094098092095093/Capturing-Chinese-Stories-Prose-and-Poems-by-Revolutionary-Chinese-Authors-Including-Lu-Xun-Hu-Shi-Zhu-Ziqing-Zhou-Zuoren-and-Lin-Yuta