Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b21de811662c73a…

MALICIOUS

PDF

19.8 KB Created: 2019-05-02 06:14:19 +01:00 Authoring application: mPDF 5.7
MD5: 334f308e2ba27bc3df50b7319d6eb72d SHA-1: 77d1f8d14a5aff9afb7d794ebaca62bb3b726add SHA-256: 6b21de811662c73a310c13ea2ed9bfd4199ef381597bc2d4a87d91e8294db6b3
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to external resources. While the document body is heavily obfuscated, the presence of numerous links suggests an attempt to direct the user to malicious content or download further stages. No scripts were extracted, and the ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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/8090093095093093/The-Dungeon-Level-Two-Le-Cachot-2-by-Kelex.pdf
    • http://loaminoo.linkpc.net/1096092097099091/Dungeon-Madness-The-Divine-Dungeon-2-by-Dakota-Krout.pdf
    • http://loaminoo.linkpc.net/9097099093091099/-4-Dungeon-Meshi-4-Delicious-in-Dungeon-4-by-Ryoko-Kui.pdf
    • http://loaminoo.linkpc.net/9097099093092093/-5-Dungeon-Meshi-5-Delicious-in-Dungeon-5-by-Ryoko-Kui.pdf
    • http://loaminoo.linkpc.net/9097099093091094/-1-Dungeon-Meshi-1-Delicious-in-Dungeon-1-by-Ryoko-Kui.pdf
    • http://loaminoo.linkpc.net/1099092099095096/The-Eternal-Dungeon-Eternal-Dungeon-1-4-amp-side-novella-by-Dusk-Peterson.pdf
    • http://loaminoo.linkpc.net/8090093095093096/Le-cachot-de-Hautefaille-by-Archipel.pdf
    • http://loaminoo.linkpc.net/6096099093093091/Cle-Campus-Level-1-Plus-Campus-Level-1-Exercise-Workbook-Plus-Grammar-Program-Introductory-Level-Plus-Audio-CD-Program-by-Cle.pdf
    • http://loaminoo.linkpc.net/5094090098096096/Bridges-to-Literature-Skillbuilder-Workbook-Level-2-Level-II-by-McDougal-Littell.pdf
    • http://loaminoo.linkpc.net/6096099092098096/Panorama-Level-2-with-Booklet-and-Level-2-Exercise-Workbook-by-Cle.pdf
    • http://loaminoo.linkpc.net/2096092091094098/The-Initiation-Slave-World-2-by-Kelex.pdf
    • http://loaminoo.linkpc.net/2099099095094096/Redemption-for-Two-Bears-Bear-Mountain-7-by-Kelex.pdf
    • http://loaminoo.linkpc.net/2099099095094094/Surrendering-to-Two-Bears-Bear-Mountain-8-by-Kelex.pdf
    • http://loaminoo.linkpc.net/2099099095096098/A-Beta-for-Two-Bears-Bear-Mountain-9-by-Kelex.pdf
    • http://loaminoo.linkpc.net/2099099099091098/Finding-His-Two-Bears-Bear-Mountain-11-by-Kelex.pdf
    • http://loaminoo.linkpc.net/7097093092095091/English-Short-Stories-with-Audio-Files-Intermediate-Level-English-Fluency-Practice-Intermediate-Level-Book-4-by-Alexander-Pavlenko.pdf
    • http://loaminoo.linkpc.net/1090098093098095098/Geo-Hetzel-and-the-Scalp-Level-Tradition-George-Hetzel-Retrospective-and-the-Scalp-Level-Artists-Exhibition-26-March-May-8-by-Paul-A-Chew.pdf
    • http://loaminoo.linkpc.net/7097093091091098/English-Short-Stories-Intermediate-Level-English-Fluency-Practice-Intermediate-Level-Book-4-by-Alexander-Pavlenko.pdf
    • http://loaminoo.linkpc.net/6094097091095/Is-It-Wrong-to-Try-to-Pick-Up-Girls-in-a-Dungeon-Light-Novels-Vol-1-Is-It-Wrong-to-Try-to-Pick-Up-Girls-in-a-Dungeon-Light-Novels-1-by-Fujino-mori.pdf
    • http://loaminoo.linkpc.net/2094095094094098/Sex-Dungeon-For-Sale-by-Patrick-Wensink.pdf

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