Malicious PDF — malware analysis report

Static analysis result for SHA-256 335be40604c8eff8…

MALICIOUS

PDF

12.6 KB Created: 2019-04-30 01:55:05 +01:00 Authoring application: mPDF 5.7
MD5: 1a747910897242c5af9edac2f3c76f55 SHA-1: e1327731248a8b79f26b9f80838c22eebd7341fe SHA-256: 335be40604c8eff8ca100925a9f4d116f084d289228941bf4025cc78ef2d6abe
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, identified as a link farm. The primary heuristic indicates this is a critical finding, suggesting the PDF is designed to direct users to a multitude of external PDF documents. While the specific malicious payload is not directly evident, the sheer volume and nature of the links point towards malicious intent, possibly for SEO manipulation or to host further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8780

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/2200209206204207/Dean-Koontz-s-Frankenstein-Volume-1-Prodigal-Son-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/3206204209208202/Prodigal-Son-Dean-Koontz-s-Frankenstein-1-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/1209206207206207/Prodigal-Son-Dean-Koontz-s-Frankenstein-1-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/3204201201208205/Prodigal-Son-Dean-Koontz-s-Frankenstein-1-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/4209203206206200/Prodigal-Son-Dean-Koontz-s-Frankenstein-1-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/3209208207204/Prodigal-Son-Dean-Koontz-s-Frankenstein-1-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/2201207204200203/The-Dead-Town-Dean-Koontz-s-Frankenstein-5-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/1205205209200203/City-of-Night-Dean-Koontz-s-Frankenstein-2-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/4204207207203/Lost-Souls-Dean-Koontz-s-Frankenstein-4-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/1201200209202202207/Dean-Koontz-Shattered-The-Vision-Night-Chills-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/4201204208209203/Phantoms-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/5208207207206/Phantoms-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/2206203208208/Strangers-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/8200201205209/Intensity-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/3207204205205/The-Husband-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/3205200200208207/The-City-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/4201202200208201/Anti-Man-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/4209203200209203/The-Husband-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/2205200207208/Beastchild-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/2205209209206200/Phantoms-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/2206203208208/Strangers-by-De

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