Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e528d8a841749a7…

MALICIOUS

PDF

65.3 KB Authoring application: Nitro PDF
MD5: e41409411c7406e71e0b6654e9fba957 SHA-1: b95fc4b3e4eff799d265cf6be446d088b65a291b SHA-256: 0e528d8a841749a788ed0de0e041e9f58cb2327fd4f5c1160e189f5d113bd8d3
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document employs a social engineering lure, instructing the user to install a browser extension or update to view content, which is a common tactic for credential theft or malware delivery. The embedded URLs and the ClamAV detection (Pdf.Phishing.TtraffRobotInstall-7605656-0) strongly indicate malicious intent, likely involving the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://kagegunu.supershopes.icu/uploads/2020/01/28/6637041.pdf
    • http://nemo.tauras-metal.ru/uploads/2020/01/29/023ef56c81dca.pdf
    • http://newerictex.com/uploads/1/3/0/2/130288673/13897d4f8c1fc4c.pdf
    • http://mobilebillboardsredwoodcity.com/uploads/1/3/0/5/130551090/8952533.pdf
    • http://tevezuzom.stoloto.info/uploads/2020/01/27/7555586.pdf
    • http://lifeinbalancetherapy.info/uploads/1/3/0/3/130313271/9cdf056e.pdf
    • http://north-carolina-charlotte-real-estate.com/uploads/1/3/0/7/130776599/tadujisazozeduro.pdf
    • http://northwestuu.com/uploads/1/3/0/7/130739930/130739930.html#competency+based+interview+questions+answers+decision+making

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000121f.bin
e7946a55b31c1eb6b2147c22c5f174b2db5444aa8d629456c849b8a7f5654d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121F 7976 bytes

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