Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53b70cd0be9a95f…

MALICIOUS

PDF

36.5 KB Created: 2021-05-11 02:30:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 519a3e3a04ca9920ca1cc12e5a15c0bc SHA-1: eb76b6c5888bb74041c83b487e31587649ef6f1a SHA-256: e53b70cd0be9a95f6d31f6b3dde3c09f379c9ecae5c4cef615931f3aeb08e076
130 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a lure for game hacks and redirects to known malicious infrastructure. The document body explicitly mentions 'Free Robux Hack' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the social engineering aspect. The embedded URL is the primary indicator of malicious intent, likely leading to a further stage of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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 https://netcdn.xyz/app/431946152/free-robux-hack-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
stream_003_off0000330e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x330E 25508 bytes
SHA-256: 835a0e16b7118a24fa01dd330a7ccc2c26810426592f76a34d83aea072a27d90
font_01_sfnt_off00006cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF7 18412 bytes
SHA-256: 8090616d8a5c0701bec53dfbbcc7430816d9db69864bd7c9067c717eb12c26b4

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