Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f158c67761a0ca5…

MALICIOUS

PDF

25.0 KB Created: 2021-06-26 08:31:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 326d60e8ac38348a5e1982069b0b8245 SHA-1: 370f3395c505c25738255b7d43ec3ea73c820009 SHA-256: 5f158c67761a0ca507de0b4a7847de96e2f8c8e2df139e7f940e51803a38558e
130 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to known malicious redirector infrastructure, specifically advertising a 'free generator / game hack'. The document body also contains similar lures and the URL http://netcdn.co/app/431946152/free-roblox-backpack-game-hack is identified as a malicious redirector. This suggests the file is part of a phishing campaign designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0358

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.co/app/431946152/free-roblox-backpack-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EC 19416 bytes
SHA-256: 94955d911d99cd19d3375f864d03cad376044b870f7727c37a69cd5ba261c377
font_01_sfnt_off00003dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DC1 18996 bytes
SHA-256: e7f1d18a416ff4673f2cf45389f08e14701643e07bae5babaef5310eff32ea9e

Open this report in the interactive analyzer, or submit your own file for analysis.