Malicious PDF — malware analysis report

Static analysis result for SHA-256 937604945aa21b55…

MALICIOUS

PDF

54.4 KB Created: 2018-06-25 02:42:48 Authoring application: Qt 5.5.1
MD5: 1aea901ebe13c72826cbc5b90c453b36 SHA-1: dfb48ba6469e6499672652e5270a416dd40f4ac9 SHA-256: 937604945aa21b55add1bed6a5c8a5b0ac665f50ba7755b7b30a2744de22e455
60 Risk Score

Malware Insights

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

The PDF file contains multiple invisible and repeated links that direct the user to external URLs. The heuristic 'PDF_REPEATED_PAYLOAD_LINK_LURE' indicates these links are designed to deliver a payload. The embedded URLs, http://larsamatgu.skilos.ru/ and http://larsamatgu.dionwars.ru/, are likely used for this purpose. No scripts were extracted, limiting further analysis of the payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier clean score 0.0052

Heuristics 2

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • 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://larsamatgu.skilos.ru/?dt&keyword=neue+liebe+joseph+von+eichendorff+sprachliche+mittel&charset=utf-8&source=weebly.com
    • http://larsamatgu.dionwars.ru/?dt&keyword=neue+liebe+joseph+von+eichendorff+sprachliche+mittel&charset=utf-8&source=weebly.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a76b.bin
04412563acdcbfc31479582fcf0e261a3e06843b6f879b1f57787d9c7b44080e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA76B 13096 bytes
font_01_sfnt_off0000d0aa.bin
618532b2b63605606933cfd58ddc9c315380c32578cccb08d7e0d56cac08e209
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AA 1440 bytes