Malicious PDF — malware analysis report

Static analysis result for SHA-256 f771f4e369e5de6c…

MALICIOUS

PDF

40.7 KB Created: 2021-05-15 02:00:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f3f1a8544a7164c04c3d0a7a39c182f7 SHA-1: 52d72380181b43c522a7bf3b8859231aa0b4f48d SHA-256: f771f4e369e5de6cc735ca59f6250bad8eb9a3f15b5e092c33a31d1fd40e9a3b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a game hack redirector lure, specifically pointing to a 'Roblox Free Robux Generator'. The embedded URL, https://netcdn.xyz/app/431946152/roblox-free-robux-generator-game-hack, is identified as a malicious redirector. This suggests the document's primary purpose is to trick users into visiting a malicious site, likely to download further malware or engage in a scam.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/roblox-free-robux-generator-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000352d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x352D 26368 bytes
SHA-256: 0b0a0f69377f4768030904fcb8811488f14dd2b8bdb1dc2f4e532f70b65cd930
font_01_sfnt_off00007315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7315 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D00 18420 bytes
SHA-256: 9bedda8babb487e8554fc45ae48be92d4657fab6cfffaa18de719644ed37071c

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