Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8bb7f3c5f6a99a2…

MALICIOUS

PDF

143.3 KB Created: 2016-12-19 10:45:42 UTC Authoring application: RAD PDF (via RAD PDF 2.38.3.1 - http://www.radpdf.com)
MD5: 1d413631a726b2c491c9e33bd7fdf7c7 SHA-1: a86feacfd530cc659caa0add4425433ab2caf983 SHA-256: f8bb7f3c5f6a99a289fb0463a40ac2e2604c8aae5e58c9e57b6e4e9a150998b8
112 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ClamAV and an ML classifier. It employs a common phishing tactic by presenting an image-based lure, which is typical for screenshot lures designed to prompt user interaction. The embedded URLs, such as http://thefashionintern.com/crech/index.php, are likely part of the redirection chain to a malicious site. No scripts were extracted, but the PDF structure and heuristics strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7503

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7325971-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7325971-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 143 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://thefashionintern.com/crech/index.php
    • http://indoorsfitness.com/crech/index.php
    • https://nic.kovo.vn/adobe
    • https://nic.kovo.vn/crech/index.php
    • http://www.animationordeath.com/crech/index.php
    • http://www.radpdf.com)/Author(Pahgy49)/Creator(RAD
    • http://www.dynaforms.com
    • http://www.radpdf.com
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/pdf/1.3/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000070f.bin
ad57695567d52b9e680e89babc17966358eca0de6e7781016c1fac9dba5bbe4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F 173472 bytes

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