Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecfa3486d9f61e54…

MALICIOUS

PDF

40.0 KB Created: 2021-05-22 19:05:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 99c2fbd73952ae8c38da0374d67795e6 SHA-1: b30bb0d9f562a9de516ad88366c9402196b742ff SHA-256: ecfa3486d9f61e546c77ffc97e931df4d5d9e1c2d0d92b6b93c8d9871c6ffa61
160 Risk Score

Malware Insights

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

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising free game hacks and generators. The primary redirect URL is https://netcdn.xyz/app/431946152/free-roblox-hack-game-hack, which is flagged as malicious. The document body and heuristics indicate a lure to exploit user interest in game cheats, likely leading to further malware download or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8015

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-roblox-hack-game-hack In PDF document text
    • http://hcberg.com/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://hcberg.com/images/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://hcberg.com/images/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • http://hcberg.com/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://hcberg.com/images/roblox-install-free_GM431946152.pdfIn 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_002_off0000322b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x322B 25636 bytes
SHA-256: ca865b1a7093f62bb006fbf3bb02cdb099175190eed44943339423d9b6babdaa
font_01_sfnt_off00006d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7E 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00007a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8F 18344 bytes
SHA-256: 9d921b2eee93f33e2efc5c53c848117e08d630d06cf868d7193b51dd4894dd93

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