Malicious PDF — malware analysis report

Static analysis result for SHA-256 78157a6c76279ea1…

MALICIOUS

PDF

45.7 KB Created: 2021-05-17 15:06:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8b97d50989e7bdcb6b7ce3de3c50f74c SHA-1: 9d0380f52c7d7268db567750e3b4d94c00b3ac19 SHA-256: 78157a6c76279ea11d99efd7f3b9347cafa751f2ffebedbab4d17580564861fc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a lure for game hacks, specifically targeting Robux and Minecraft. The primary link, https://netcdn.xyz/app/431946152/robux-online-game-hack, is flagged as a redirector to a 'free generator / game hack' site. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • 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 https://netcdn.xyz/app/431946152/robux-online-game-hack PDF link annotation
    • https://my-private-intendant.com/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://my-private-intendant.com/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • https://my-private-intendant.com/images/free-robux-no-verification-2021-ios_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_003_off00004a65.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A65 25104 bytes
SHA-256: 972408134934c5c65e0b5e3c276ea37b6a4001ecdb73d50b37b6247c782476fd
font_01_sfnt_off000083d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D8 3948 bytes
SHA-256: 4c836a6246321303d10fca719808d35220b906ca76bbb44946cc04297e9ce808
font_02_sfnt_off000090d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90D0 18044 bytes
SHA-256: 613688d39500d5b16bf64409f0aca6fe840d07506161475672c290022fb5aac0

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