Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccff835966df6b8b…

MALICIOUS

PDF

42.0 KB Created: 2021-05-11 07:32:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 97b3a795772e29719e02b281d8460f07 SHA-1: d45ba211681afb227ed4db4323366c450089257c SHA-256: ccff835966df6b8b2be1da354cf947739d046ba9e4d3d95697b9e8a9a9727a56
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a "Coin Master Hack". The document body and heuristics indicate a lure for game-related cheats or hacks, which is a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics confirm the presence of malicious redirector links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-hack-apk-latest-version-2021-game-hack In PDF document text
    • http://practicaltech.com/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/free-coin_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://practicaltech.com/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://practicaltech.com/images/free-800-robux_GM431946152.pdfIn PDF document text
    • http://practicaltech.com/images/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://practicaltech.com/images/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://practicaltech.com/images/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://practicaltech.com/images/how-to-get-free-robux-with-no-verification_GM431946152.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_off000047b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B7 25352 bytes
SHA-256: 4a52b463f730b3b48aaf70a8449d591a33fab2f4dd4c81f4a386bbe958650d40
font_01_sfnt_off00008102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8102 18428 bytes
SHA-256: 3ea7a61419cbe52eb029f29c9b150dae48cf78ebe9ef7deec7bc9e8a272032f3

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