Malicious PDF — malware analysis report

Static analysis result for SHA-256 624ddbf9ac11d0f5…

MALICIOUS

PDF

17.9 KB Created: 2019-05-04 13:45:02 +01:00 Authoring application: mPDF 5.7 First seen: 2021-06-13
MD5: 1371877a9a92c588fe9965e38eab9551 SHA-1: 5809b4860e2fec33af2b0f94efb379cb3cace08f SHA-256: 624ddbf9ac11d0f5c7822eb6756ce3b38e5ab8483d93080d89c856385aecdca2
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. While many of these links are marked as confirmed benign, the sheer volume and the heuristic's classification suggest a malicious intent, possibly for SEO manipulation or to distribute further malware. No scripts were extracted, but the presence of embedded links points to a potential T1059.007 (JavaScript) execution if the links were to exploit PDF vulnerabilities or redirect to malicious sites. The primary attack pattern observed is the mass distribution of external links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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/4097090095096096/A-Little-F-d-Up-Why-Feminism-Is-Not-a-Dirty-Word-by-Julie-Zeilinger.pdf In PDF document text
    • http://loaminoo.linkpc.net/1098094098094098/Four-Letter-Word-Dirty-Deeds-1-by-J-Daniels.pdfIn PDF document text
    • http://loaminoo.linkpc.net/1094097097096090/Say-the-Word-by-Julie-Johnson.pdfIn PDF document text
    • http://loaminoo.linkpc.net/3093094097091099/Dirty-Business-by-Julie-Elizabeth-Powell.pdfIn PDF document text
    • http://loaminoo.linkpc.net/3096097095092091/The-Last-Word-and-the-Word-After-That-A-Tale-of-Faith-Doubt-and-a-New-Kind-of-Christianity-by-Brian-D-McLaren.pdfIn PDF document text
    • http://loaminoo.linkpc.net/4094091098093095/Word-Warriors-35-Women-Leaders-in-the-Spoken-Word-Revolution-by-Alix-Olson.pdfIn PDF document text
    • http://loaminoo.linkpc.net/9091094097097093/The-Insomniac-s-Dictionary-The-Last-Word-On-The-Odd-Word-by-Paul-Hellweg.pdfIn PDF document text
    • http://loaminoo.linkpc.net/1090093096095097/A-Knight-of-the-Word-Word-amp-Void-2-by-Terry-Brooks.pdfIn PDF document text
    • http://loaminoo.linkpc.net/2091091091099095/Rose-City-Vice-Portland-in-the-70-s-Dirty-Cops-and-Dirty-Robbers-by-Phil-Stanford.pdfIn PDF document text
    • http://loaminoo.linkpc.net/1091090098097090096/Dirty-The-Five-Part-Serial-Bundle-Dirty-1-5-by-Cheryl-McIntyre.pdfIn PDF document text
    • http://loaminoo.linkpc.net/1097098093093/Dirty-Secrets-Dirty-War-Buenos-Aires-Argentina-1976-1983-The-Exile-of-Editor-Robert-J-Cox-by-David-Cox.pdfIn PDF document text
    • http://loaminoo.linkpc.net/3090092092097095/Dirty-Neighbor-The-Dirty-Suburbs-1-by-Cassie-Ann-L-Miller.pdfIn PDF document text
    • http://loaminoo.linkpc.net/3094095099092091/Dirty-Promises-Dirty-Angels-3-by-Karina-Halle.pdfIn PDF document text
    • http://loaminoo.linkpc.net/3096090/Dirty-Deeds-Dirty-Angels-2-by-Karina-Halle.pdfIn PDF document text
    • http://loaminoo.linkpc.net/4095096095097094/Shooting-Dirty-Dirty-Eleven-2-by-Jill-Sorenson.pdfIn PDF document text
    • http://loaminoo.linkpc.net/9090098092097094/The-Everything-Giant-Book-of-Word-Searches-Over-300-puzzles-challenge-even-the-most-diehard-word-search-fans-Over-300-Puzzles-to-Challenge-Even-the-Most-Diehard-Word-Search-Fan-by-Charles-Timmerman.pdfIn PDF document text
    • http://loaminoo.linkpc.net/2097090097094098/Dirty-Bad-Savage-Dirty-Bad-2-by-Jade-West.pdfIn PDF document text
    • http://loaminoo.linkpc.net/3098099096092099/Dirty-Bad-Wrong-Dirty-Bad-1-by-Jade-West.pdfIn PDF document text
    • http://loaminoo.linkpc.net/3094092/Dirty-Bad-Wrong-Dirty-Bad-1-by-Jade-West.pdfIn PDF document text
    • http://loaminoo.linkpc.net/3095096096091093/Dirty-Lies-Dirty-Deeds-2-by-S-E-Jakes.pdfIn PDF document text

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