Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9b9d10d42cc923…

MALICIOUS

PDF

13.7 KB Created: 2019-04-30 03:59:56 +01:00 Authoring application: mPDF 5.7
MD5: ba3bee6fb93331908b214d136a711bfc SHA-1: 3565c1dbbd8d89d4c7694fc9b9d179d7bc852664 SHA-256: dc9b9d10d42cc9233a6feac114748ee99959bcc21f1bb37f524bc29940c3f3aa
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, which is a common technique for SEO poisoning or distributing malicious content. The ML classifier also flagged this PDF as malicious with high confidence. While the document body is heavily corrupted, the presence of numerous links to external PDFs suggests a content distribution or redirection scheme. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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/1091092095092090/Valentine-Joe-Rose-1-by-Rebecca-Stevens.pdf
    • http://loaminoo.linkpc.net/1090093095097093092/Fallen-in-the-Fight-Farnworth-and-Kearsley-Men-Who-Died-in-the-Great-War-by-Neil-Richardson.pdf
    • http://loaminoo.linkpc.net/3094098092098095/A-Town-Called-Valentine-Valentine-Valley-1-by-Emma-Cane.pdf
    • http://loaminoo.linkpc.net/2092095092091093/Sleigh-Bells-in-Valentine-Valley-Valentine-Valley-5-by-Emma-Cane.pdf
    • http://loaminoo.linkpc.net/1091098096092099092/Ryan-s-Dinosaur-and-the-Neon-Fish-Two-Stories-from-Rebecca-s-Collection-by-Rebecca-Lynne-Enden.pdf
    • http://loaminoo.linkpc.net/2091098097092099/Valentine-by-S-P-Somtow.pdf
    • http://loaminoo.linkpc.net/3095091099093091/The-Valentine-by-Elizabeth-A-Lance.pdf
    • http://loaminoo.linkpc.net/2098096095095090/Christmas-Hookup-by-Lex-Valentine.pdf
    • http://loaminoo.linkpc.net/4090095091094094/Midnight-Valentine-by-J-T-Geissinger.pdf
    • http://loaminoo.linkpc.net/1093092092095093/Very-Valentine-by-Adriana-Trigiani.pdf
    • http://loaminoo.linkpc.net/7093098098099092/My-St-Valentine-s-Day-by-Lauren-Oliver.pdf
    • http://loaminoo.linkpc.net/3092090096090/The-Ant-Colony-by-Jenny-Valentine.pdf
    • http://loaminoo.linkpc.net/9093098096095094/Bei-Landung-Liebe-by-Kim-Valentine.pdf
    • http://loaminoo.linkpc.net/4099092097092096/The-Valentine-s-Fae-by-Emma-Shortt.pdf
    • http://loaminoo.linkpc.net/5099092098090098/Knocked-Up-on-Valentine-s-Day-by-Amy-Brent.pdf
    • http://loaminoo.linkpc.net/1092095097099091/All-Fired-Up-by-Carmine-Valentine.pdf
    • http://loaminoo.linkpc.net/6093092099094099/Ayesha-by-Valentine-Renehan.pdf
    • http://loaminoo.linkpc.net/1099092096099094/Outside-Valentine-by-Liza-Ward.pdf
    • http://loaminoo.linkpc.net/3097092090098098/The-Celia-Collection-by-M-S-Valentine.pdf
    • http://loaminoo.linkpc.net/2099093098090094/Zip-amp-Milly-Big-Water-1-7-by-Alex-Valentine.pdf

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