Malicious PDF — malware analysis report

Static analysis result for SHA-256 6163c76f6ed4ddbe…

MALICIOUS

PDF

44.1 KB Created: 2021-05-15 10:19:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e0c654bf5430a5336d2be21ae4063de1 SHA-1: bda0aefce3400031c0f447e1baaceb09d94521dd SHA-256: 6163c76f6ed4ddbe1aa4469786319a66feea66d1d93fc1c8ab6f35a5a4db764c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages, aiming to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-hacks-for-spins-game-hack In PDF document text
    • http://fccsms.com/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://fccsms.com/images/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://fccsms.com/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/original-roblox_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://fccsms.com/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-hack-mod-apk-35-8_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_003_off00004704.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4704 25068 bytes
SHA-256: cc76ddc657cccc10c1ef916f3c83cf2cd4cd226b41cd57b777fce39b72f2f87a
font_01_sfnt_off00007f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F45 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6F 18056 bytes
SHA-256: 12d79a7ddbb75c7a0854102822057d5441bee2ca4a20c79f8211a3d0b9a1f375

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