Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf916c9e9775fa2…

MALICIOUS

PDF

25.8 KB Created: 2019-04-30 04:26:09 +01:00 Authoring application: mPDF 5.7
MD5: d5958be998ce2b5d611c5ed9a39601f2 SHA-1: ad88ee04e696e220f3e6c96413289ca37d07f542 SHA-256: acf916c9e9775fa251fa04678986955395b296e2ad82847f7ea5a74c14ae4da4
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDFs hosted on the domain xiixmcuin.linkpc.net. This behavior is indicative of a link farm or a lure to a malicious site, as flagged by the PDF_SEO_LINK_FARM heuristic. While the specific intent beyond linking is unclear due to the lack of readable document body text and scripts, the ML classifier strongly suggests maliciousness. The primary IOCs are the URLs pointing to the linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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/6204200206206207/The-Modern-World-System-II-Mercantilism-and-the-Consolidation-of-the-European-World-Economy-1600-1750-by-Immanuel-Wallerstein.pdf
    • http://xiixmcuin.linkpc.net/1204202207206201/World-Systems-Analysis-An-Introduction-by-Immanuel-Wallerstein.pdf
    • http://xiixmcuin.linkpc.net/6204200206206209/European-Universalism-The-Rhetoric-of-Power-by-Immanuel-Wallerstein.pdf
    • http://xiixmcuin.linkpc.net/6204200206208202/The-Essential-Wallerstein-by-Immanuel-Wallerstein.pdf
    • http://xiixmcuin.linkpc.net/1209206209203206/The-Great-Divergence-China-Europe-and-the-Making-of-the-Modern-World-Economy-by-Kenneth-Pomeranz.pdf
    • http://xiixmcuin.linkpc.net/1200206208208200207/The-Limits-of-Empire-European-Imperial-Formations-in-Early-Modern-World-History-Essays-in-Honor-of-Geoffrey-Parker-by-Tonio-Andrade.pdf
    • http://xiixmcuin.linkpc.net/2205203200200205/The-World-That-Trade-Created-Society-Culture-and-the-World-Economy-1400-to-the-Present-by-Kenneth-Pomeranz.pdf
    • http://xiixmcuin.linkpc.net/6204200206207200/Utopistics-Or-Historical-Choices-of-the-Twenty-First-Century-by-Immanuel-Wallerstein.pdf
    • http://xiixmcuin.linkpc.net/3203203204202202/Unthinking-Social-Science-Limits-Of-19Th-Century-Paradigms-by-Immanuel-Wallerstein.pdf
    • http://xiixmcuin.linkpc.net/2200209204205205/To-Change-the-World-The-Irony-Tragedy-and-Possibility-of-Christianity-in-the-Late-Modern-World-by-James-Davison-Hunter.pdf
    • http://xiixmcuin.linkpc.net/5202203201206209/Restless-Empire-China-and-the-World-Since-1750-by-Odd-Arne-Westad.pdf
    • http://xiixmcuin.linkpc.net/2200200201205202/Between-the-Devil-and-the-Deep-Blue-Sea-Merchant-Seamen-Pirates-and-the-Anglo-American-Maritime-World-1700-1750-by-Marcus-Rediker.pdf
    • http://xiixmcuin.linkpc.net/2205203204204206/Into-The-Open-Economy-How-Everything-You-Know-About-The-World-Is-About-To-Change-by-Colin-R-Turner.pdf
    • http://xiixmcuin.linkpc.net/6207207208203205/The-Global-Code-What-We-All-Value-and-Why-in-the-New-World-Economy-by-Clotaire-Rapaille.pdf
    • http://xiixmcuin.linkpc.net/1201204202207203205/Surgical-Efficiency-and-Economy-See-Proceedings-of-the-3rd-World-Conference-by-P-Dohrmann.pdf
    • http://xiixmcuin.linkpc.net/5209201209204201/Peasants-And-Capital-Dominica-In-The-World-Economy-by-Michel-Rolph-Trouillot.pdf
    • http://xiixmcuin.linkpc.net/1205207201204208/Crisis-At-Sea-The-United-States-Navy-in-European-Waters-in-World-War-I-by-William-N-Still-Jr-.pdf
    • http://xiixmcuin.linkpc.net/9207206200208/Fault-Lines-How-Hidden-Fractures-Still-Threaten-the-World-Economy-by-Raghuram-G-Rajan.pdf
    • http://xiixmcuin.linkpc.net/1203207205200201/Monetary-theory-Inflation-interest-and-growth-in-the-world-economy-by-Robert-A-Mundell.pdf
    • http://xiixmcuin.linkpc.net/1201200200202209/The-Indians-New-World-Catawbas-and-Their-Neighbors-from-European-Contact-Through-the-Era-of-Removal-by-James-H-Merrell.pdf
    • http://xiixmcuin.linkpc.net/12092062

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