Malicious PDF — malware analysis report

Static analysis result for SHA-256 e771637b6437c376…

MALICIOUS

PDF

41.6 KB Created: 2021-05-17 10:04:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 23bdb39cf5766e1ff9009c967e29615e SHA-1: 83adeea4f1c2af865c6cced2af2d8923c840e58a SHA-256: e771637b6437c37672e2b9fc2567a73a0cf7e405eac7cc4dd056116576b42035
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, with one prominently identified as a malicious redirector leading to a 'game hack' lure. The document body, though partially corrupted, also contains references to game hacks and URLs. This suggests the primary purpose is to trick users into visiting malicious sites, likely for further exploitation or malware delivery.

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/how-to-hack-coins-in-mcpe-master-game-hack In PDF document text
    • https://www.ghknights.org/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.ghknights.org/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.ghknights.org/images/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://ghknights.org/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://www.ghknights.org/images/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://ghknights.org/images/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • https://www.ghknights.org/images/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • https://www.ghknights.org/images/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://ghknights.org/images/freerubux_GM431946152.pdfIn PDF document text
    • https://www.ghknights.org/images/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.ghknights.org/images/free-robux-net_GM431946152.pdfIn PDF document text
    • https://www.ghknights.org/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://www.ghknights.org/images/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • http://ghknights.org/images/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • https://www.ghknights.org/images/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://www.ghknights.org/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48E3 24520 bytes
SHA-256: fb1fd336e119e2d7690bb02525f4315c57a39612db8975f130f26e968e467559
font_01_sfnt_off000080b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B0 18056 bytes
SHA-256: ea749421c9763e897f0775a2fca8a7e481d8ca205e309ab3fda826117ef8ab8f

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