Malicious PDF — malware analysis report

Static analysis result for SHA-256 af5dcf40f0c67d08…

MALICIOUS

PDF

18.4 KB Created: 2019-05-07 04:11:10 +01:00 Authoring application: mPDF 5.7
MD5: a4c83f20744d5289565981431b945440 SHA-1: 91dde84271581158c7071b03c7a3a1fc117f48a3 SHA-256: af5dcf40f0c67d081b8f6387e332279815c1e5261cfdade31e1c187d86af1845
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. While many of these links were flagged as confirmed benign, the sheer volume and the ML classifier's high confidence score suggest a malicious intent, possibly for SEO poisoning or to distribute further malware. The attack pattern is consistent with a phishing or social engineering lure designed to drive traffic to external sites.

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/4091099091098094/--LOST-GIRLS-1-Shingeki-no-Kyojin-Lost-Girls-1-Attack-on-Titan-Lost-Girls-Manga-1-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/8094090093094092/-24-Shingeki-no-Kyojin-24-Attack-on-Titan-24-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/9098093093/-15-Shingeki-no-Kyojin-15-Attack-on-Titan-15-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/3097095094092094/-Before-the-Fall-8-Shingeki-no-Kyojin-Before-the-Fall-8-Attack-on-Titan-Before-the-Fall-Manga-8-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/1092091092098097/Lost-Girls-Lost-Girls-1-3-by-Alan-Moore.pdf
    • http://loaminoo.linkpc.net/3097095099094090/Attack-on-Titan-Before-the-Fall-Vol-2-Attack-on-Titan-Before-the-Fall-Manga-2-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/4096090098094092/Attack-on-Titan-Before-the-Fall-Vol-8-Attack-on-Titan-Before-the-Fall-Manga-8-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/4097091090099099/-1-Sungeki-no-Kyojin-1-Spoof-on-Titan-1-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/4097091091096090/-2-Sungeki-no-Kyojin-2-Spoof-on-Titan-2-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/4096091099091099/Attack-on-Titan-Vol-20-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/1090093093091099099/Attack-on-Titan-Vol-12-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/3092099094090/Attack-on-Titan-Vol-15-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/4097091090094094/--1-Shingeki-Kyojin-Chuugakkou-1-Attack-on-Titan-Junior-High-1-by-Saki-Nakagawa.pdf
    • http://loaminoo.linkpc.net/1090091090096093/Attack-on-Titan-Vol-2-Attack-on-Titan-2-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/3091094094093098/Attack-on-Titan-Vol-6-Attack-on-Titan-6-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/1091095094090093095/Attack-on-Titan-The-Spinoffs-Collection-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/7094096099093/Attack-on-Titan-Colossal-Edition-1-by-Hajime-Isayama.pdf
    • http://loaminoo.linkpc.net/3090094097094094/Giving-It-Up-The-Lost-Girls-1-by-Amber-Lin.pdf
    • http://loaminoo.linkpc.net/4091090095090095/Lost-Girls-The-Cellar-2-by-Bob-Mayer.pdf
    • http://loaminoo.linkpc.net/2099094098090093/The-Lost-Girls-of-Camp-Forevermore-by-Kim-Fu.pdf
    • http://loaminoo.linkpc.net/3097095099094090/Attack-on-Titan-Before-the-Fall-Vol-2-

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