Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc5da948b67f107…

MALICIOUS

PDF

38.4 KB Created: 2021-05-22 16:51:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4c93e75714ca4b4549057e1ae5f71de1 SHA-1: 64e9bcd01d2e05908873a123ca463421812647be SHA-256: acc5da948b67f1078081ee76f8b0177a6f306959080cfe94bd6c758e946c552e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, 'CLICK HERE TO ACCESS ROBLOX GENERATOR', designed to trick users into downloading a malicious payload. The primary lure is related to 'Free Robux Script' and 'game hack' generators, which redirects to suspicious URLs. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a social engineering attack aimed at delivering malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7268

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-script-game-hack In PDF document text
    • http://thamelinn.com/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-daily-spin-coin-master-game_GM406889139.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_off000032d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32D9 24948 bytes
SHA-256: 972cb8ab05b29dd735d7efaac03746b56c7262d91d180dc4b10cc4c405f46fd9
font_01_sfnt_off00006a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A42 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000742c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742C 18416 bytes
SHA-256: 7904477eb6282cb79bb1f8d95588be1a5283b3abf5667e30a4d761915d4b26ef

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