Malicious PDF — malware analysis report

Static analysis result for SHA-256 33feca3984daf620…

MALICIOUS

PDF

43.2 KB Created: 2021-05-15 15:32:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f78042e6bf153c3b683a72e7dfffef5c SHA-1: 93935fa28b28cd2a48868c9e4e74ed1a3d4553d8 SHA-256: 33feca3984daf620f6b2823332608a24abd0e4935bf861c94d5d62e994618bf3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector related to game hacks. The document body explicitly mentions 'free spins on Coin Master' and includes a URL pointing to a generator, indicating a lure for users seeking in-game advantages. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/how-can-i-get-free-spins-on-coin-master-game-hack In PDF document text
    • http://atrax.hr/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-claim-free-spins_GM406889139.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_003_off000047e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E7 27528 bytes
SHA-256: 107c63fe724eca9ea0d7a2dd249c534645308f2f08764b9bf31d1b504ccee00e
font_01_sfnt_off0000872d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x872D 18052 bytes
SHA-256: f4ab70c7a1b321e89283bf56011259b2481f340c7b70b557de06403c5562b8cd

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