Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbbb2a3a13fe91ff…

MALICIOUS

PDF

15.1 KB Created: 2019-05-05 16:30:13 +01:00 Authoring application: mPDF 5.7
MD5: f5f447b0e7dc7737e354c927e0a80ac7 SHA-1: 9aa161020d451ff2bd6cd49c956c7916267714a4 SHA-256: cbbb2a3a13fe91ff64ab69f627ce95a8f6d33641446b59a76408a4744052b2f6
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external websites, a technique often used for SEO manipulation or to host malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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/3098099099092092/Nothing-Short-of-Dying-Clyde-Barr-1-by-Erik-Storey.pdf
    • http://loaminoo.linkpc.net/3093092092099098/The-Short-Stories-of-Sean-O-Faolain-A-Study-in-Descriptive-Techniques-by-Joseph-Storey-Rippier.pdf
    • http://loaminoo.linkpc.net/1098090099095/Storey-s-Basic-Country-Skills-A-Practical-Guide-to-Self-Reliance-by-M-John-Storey.pdf
    • http://loaminoo.linkpc.net/8091094097092097/Twenty-Short-Pieces-for-Piano-by-Erik-Satie.pdf
    • http://loaminoo.linkpc.net/4090095096096092/Tales-from-the-Dying-Grass-The-Short-Story-Supposition-Volume-3-by-Elizabeth-S-Tyree.pdf
    • http://loaminoo.linkpc.net/1090098090090097091/Rotes-Meer-Der-achte-Fall-f-r-Erik-Winter-Ein-Erik-Winter-Krimi-by-ke-Edwardson.pdf
    • http://loaminoo.linkpc.net/6094097099094096/Buddhism-in-China-Collected-Papers-of-Erik-Zurcher-by-Erik-Z-rcher.pdf
    • http://loaminoo.linkpc.net/8097094090094096/Erik-Lundberg-Studies-in-Economic-Instability-and-Change-by-Erik-Lundberg.pdf
    • http://loaminoo.linkpc.net/6091095095092095/A-Mammal-s-Notebook-Collected-Writings-of-Erik-Satie-by-Erik-Satie.pdf
    • http://loaminoo.linkpc.net/7090099096093097/As-I-Lay-Dying---Awakened-Songbook-by-As-I-Lay-Dying.pdf
    • http://loaminoo.linkpc.net/4099090094095099/The-Arx-by-Jay-Allan-Storey.pdf
    • http://loaminoo.linkpc.net/3092092090091093/Overtaken-by-Valerie-Storey.pdf
    • http://loaminoo.linkpc.net/3096099097097/Pasmore-by-David-Storey.pdf
    • http://loaminoo.linkpc.net/3099092099093090/Astray-by-Ginny-Clyde.pdf
    • http://loaminoo.linkpc.net/3090094092094095/Redeye-by-Clyde-Edgerton.pdf
    • http://loaminoo.linkpc.net/3094090098090091/The-52-Storey-Treehouse-by-Andy-Griffiths.pdf
    • http://loaminoo.linkpc.net/1091093098094097093/Hide-Clyde-by-Russel-Benfanti.pdf
    • http://loaminoo.linkpc.net/2096099093097090/In-The-Zone-How-Champions-Think-and-Win-Big-by-Clyde-Brolin.pdf
    • http://loaminoo.linkpc.net/8095090092098/The-39-Storey-Treehouse-by-Andy-Griffiths.pdf
    • http://loaminoo.linkpc.net/1091093091099090/Flight-Into-Camden-by-David-Storey.pdf
    • http://loaminoo.linkpc.net/7090099096093097/As-I-Lay-Dying---Awakened-Songboo

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