Malicious PDF — malware analysis report

Static analysis result for SHA-256 2768a2c2df3f188c…

MALICIOUS

PDF

32.1 KB Created: 2021-07-19 02:32:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b8be2b8068bf1609e7fff44b4aab9811 SHA-1: d8e5c18b72c7498bcfeb7790f7f3a49aa8ae5ee3 SHA-256: 2768a2c2df3f188ce44d5fa5e21643fc83f2e425e243190d9d17a5f59e02ab42
160 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/431946152/free-robux-app-game-hack. This redirector is presented as a 'free generator / game hack' lure, aiming to trick users into clicking. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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.tw/app/431946152/free-robux-app-game-hack In PDF document text
    • https://www.mosaikshop.at/images/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://www.mosaikshop.at/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.mosaikshop.at/images/minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.mosaikshop.at/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mosaikshop.at/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://www.mosaikshop.at/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://www.mosaikshop.at/images/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off00002937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2937 22312 bytes
SHA-256: e485aa082c3a74bb4f172381151c7862b8e9aa8024867cfd163b7b84ac9bcc0f
font_01_sfnt_off00005b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1D 18376 bytes
SHA-256: 384498ba111d6873fd518918b68e990ead829c843169c484025de2cce92be77d

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