Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee41fce14db4d88…

MALICIOUS

PDF

13.6 KB Created: 2019-04-28 08:51:58 +01:00 Authoring application: mPDF 5.7
MD5: e769bc6d1ca6d4e75129a9bdba6608ca SHA-1: 2a890f38274d19a44166af0788b4b8b5e5e57136 SHA-256: 1ee41fce14db4d889e1b4760c12f0c2bc93f9ae86916b74384b588fcbfc414b2
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified as a link farm. While the specific URLs extracted appear benign, the heuristic 'PDF_SEO_LINK_FARM' indicates a malicious intent to manipulate search engine results or distribute content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, preventing a more detailed analysis of the immediate user-facing lure.

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/4097094095095094/Moonlight-Murder-The-Last-Poetic-Prose-of-D-B-Wallace-by-D-B-Wallace.pdf
    • http://loaminoo.linkpc.net/7097090090095092/BEN-HUR-THE-FAIR-GOD-amp-THE-PRINCE-OF-INDIA-or-Why-Constantinople-Fell-LEW-WALLACE-PREMIUM-COLLECTION-Timeless-Wisdom-Collection-Book-1825-by-Lew-Wallace.pdf
    • http://loaminoo.linkpc.net/3093095096/String-Theory-David-Foster-Wallace-on-Tennis-by-David-Foster-Wallace.pdf
    • http://loaminoo.linkpc.net/2097095095098091/Poems-Wallace-Stevens-by-Wallace-Stevens.pdf
    • http://loaminoo.linkpc.net/3099093092098094/Letters-of-Wallace-Stevens-by-Wallace-Stevens.pdf
    • http://loaminoo.linkpc.net/8094098097095092/Ben-Hur-by-Lew-Wallace.pdf
    • http://loaminoo.linkpc.net/2096092093095092/The-Painting-by-F-K-Wallace.pdf
    • http://loaminoo.linkpc.net/2095091094096/The-Assistant-Self-by-F-L-Wallace.pdf
    • http://loaminoo.linkpc.net/2097090090090096/Retrospection-by-S-L-Wallace.pdf
    • http://loaminoo.linkpc.net/1098091090091094/Pookie-by-Ivy-L-Wallace.pdf
    • http://loaminoo.linkpc.net/2098094093093092/Yes-Man-by-Danny-Wallace.pdf
    • http://loaminoo.linkpc.net/9099093097098099/Tommy-by-R-S-Wallace.pdf
    • http://loaminoo.linkpc.net/2097097091098093/Price-of-a-Bounty-by-S-L-Wallace.pdf
    • http://loaminoo.linkpc.net/1091092093091094/Little-Joe-by-Sandra-Neil-Wallace.pdf
    • http://loaminoo.linkpc.net/5091090098093096/Mavis-and-Merna-by-Ian-Wallace.pdf
    • http://loaminoo.linkpc.net/2094092095090/witzend-by-Wallace-Wood.pdf
    • http://loaminoo.linkpc.net/7092098091091/The-Miracle-by-Irving-Wallace.pdf
    • http://loaminoo.linkpc.net/7099095092096095/How-to-Catch-an-Elf-by-Adam-Wallace.pdf
    • http://loaminoo.linkpc.net/2091099095097097/Encounters-by-Jason-Wallace.pdf
    • http://loaminoo.linkpc.net/5094091099094097/Jabberwocky-5-by-Sean-Wallace.pdf
    • http://loaminoo.linkpc.net/2098094093093092/Yes-M

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