Malicious PDF — malware analysis report

Static analysis result for SHA-256 7629dfcc93455786…

MALICIOUS

PDF

19.3 KB
MD5: 156a9e46abb613eb6d046fb8be05571c SHA-1: c9967b4f4675212a7cef9332d09ae4da19df8d05 SHA-256: 7629dfcc9345578626a250afb67027955c6f78dd80b771c2968c5be0d4b11c59
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF employs a common screenshot lure technique, presenting itself as a clickable image to entice users into interacting with a malicious link. The embedded URI redirects to a secondary PDF hosted on 'e-dropbox.biz', indicating a likely phishing or credential harvesting attempt. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6821

Heuristics 5

  • Malformed JPEG2000/JP2 box structure high CVE related PDF_JP2_BOX_ANOMALY
    PDF embeds JPEG2000/JP2 data with malformed box sizes. This is a parser-exploit indicator for JPX/JPEG2000 CVE families, not a unique CVE fingerprint.
  • ClamAV: Pdf.Dropper.Agent-7143916-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7143916-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 1 text block(s), carries a click-outward action, and is only 19 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/
    • https://appengine.google.com/_ah/logout?continue=https%3A%2F%2Fe-dropbox.biz%2Fdoc058915654e.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_cff_off00001346.bin
6db39fe1fc9fa7d77bf6c572894eb52cf6be89c0c86e905008a8d287b1bfdacf		 pdf-font-stream PDF embedded font (cff) at offset 0x1346 2567 bytes

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