Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bbfc7416646cc7f…

MALICIOUS

PDF

34.9 KB Created: 2021-05-21 18:51:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 62e05e5e6ac8a4722f5ae3171f8ca0c5 SHA-1: b6ebc3bc5239b47169560d24a64d33215407d2be SHA-256: 9bbfc7416646cc7f34212be344719f37dcfc01e24ccd9af8782ee0e93e91a62b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body explicitly mentions 'Free Coins Coin Master Link' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', indicating a lure for a game-related scam. The presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent, likely to redirect users to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/406889139/free-coins-coin-master-link-game-hack In PDF document text
    • http://neltalen.nl/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/optifine-pe_GM479516143.pdfIn 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
stream_002_off00003064.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3064 24272 bytes
SHA-256: bec8f126791ca49ec1b37a3399d375937a18cb60fc7837a7b608ce00dd5908b1
font_01_sfnt_off0000680d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680D 17880 bytes
SHA-256: 1662a5b383d9ad60b7b9cee618f90cf0031b74e1c8940e2d562def689eb52552

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