Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ac27a4ee9408de…

MALICIOUS

PDF

12.9 KB Created: 2019-05-04 14:14:49 +01:00 Authoring application: mPDF 5.7
MD5: 17ce29fd89793710b666a48b8681be1f SHA-1: 926bf505f79e0ebf01e38a36ef63d507eea39610 SHA-256: f5ac27a4ee9408de48409c4fcd1739c348f20f2d3e6167e92c5f956c6d0c1700
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, forming a link farm. This technique is often used to obscure malicious intent or to distribute further malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9006

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/7091090098096090/--Bokura-no-Negai-by-Kotetsuko-Yamamoto.pdf
    • http://loaminoo.linkpc.net/7091090098098097/Blooming-Darling-Vol-2-by-Kotetsuko-Yamamoto.pdf
    • http://loaminoo.linkpc.net/7091090097091094/-Seventeen-Syllables-Hisaye-Yamamoto-by-Hisaye-Yamamoto.pdf
    • http://loaminoo.linkpc.net/2098094090097093/--Bokura-no-Mitsudomoe-Sensou-by-SHOOWA.pdf
    • http://loaminoo.linkpc.net/6096093092099095/--Sakura-no-Ame-Bokura-wa-Koko-de-Aou-by-Hitomi-Amamiya.pdf
    • http://loaminoo.linkpc.net/2096093097097090/Kaua-i-by-Luci-Yamamoto.pdf
    • http://loaminoo.linkpc.net/1096094093091092/Betty-San-by-Michiko-Yamamoto.pdf
    • http://loaminoo.linkpc.net/7091090098098093/Stina-by-Lani-Yamamoto.pdf
    • http://loaminoo.linkpc.net/6097097094097097/Hagakure-by-Yamamoto-Tsunetomo.pdf
    • http://loaminoo.linkpc.net/7091090097091093/Attack-on-Yamamoto-by-Carroll-V-Glines.pdf
    • http://loaminoo.linkpc.net/3091091099092090/Ballerina-Birdies-by-Marina-Yamamoto.pdf
    • http://loaminoo.linkpc.net/7091090097090098/Yamamoto-by-John-Deane-Potter.pdf
    • http://loaminoo.linkpc.net/1096092094093095/The-Stories-of-Ibis-by-Hiroshi-Yamamoto.pdf
    • http://loaminoo.linkpc.net/9097099094097094/Ichi-the-killer-vol-6-by-Hideo-Yamamoto.pdf
    • http://loaminoo.linkpc.net/2098099098098091/Seventeen-Syllables-and-Other-Stories-by-Hisaye-Yamamoto.pdf
    • http://loaminoo.linkpc.net/7091090099097091/Dance-Till-Tomorrow-Vol-1-by-Naoki-Yamamoto.pdf
    • http://loaminoo.linkpc.net/3097092092094/Hagakure-The-Book-of-the-Samurai-by-Yamamoto-Tsunetomo.pdf
    • http://loaminoo.linkpc.net/7091090097098096/Yamamoto-Zenjirou-to-Moushimasu-Vol-03-by-Y-ko-Maki.pdf
    • http://loaminoo.linkpc.net/2098090094099095/Yamamoto-Zenjirou-to-Moushimasu-Vol-01-by-Y-ko-Maki.pdf
    • http://loaminoo.linkpc.net/7091090099096098/Pok-mon-Omega-Ruby-Alpha-Sapphire-Vol-1-by-Satoshi-Yamamoto.pdf
    • http://loaminoo.linkpc.net/9097099094097094/Ichi-the-killer-v

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