Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9accf4df0c9fd1…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 09:31:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5f0daf68878493fcec2e1625cdcb08f6 SHA-1: 3a13238fa087e52ce1689b44e101b8059323c7d3 SHA-256: 8e9accf4df0c9fd191a83e1caae1f3b2c441012308c11cafe2662bf0be87ef2b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a prominent link disguised as a 'free generator / game hack' lure, which is a common social engineering tactic to trick users into visiting malicious websites. The link redirects to a known malicious infrastructure, indicating a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/get-coin-master-free-spin-game-hack In PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/pokemon-go-free-remote-raid-pass-february-2021_GM1094591345.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/watch-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/get-free-robux_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_004_off000050aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50AA 25208 bytes
SHA-256: 40c98a6247618477ab912d34e7a3f7e98268ca2de0812d0f0612892b3934f074
font_01_sfnt_off000089e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E2 17884 bytes
SHA-256: e2d35692e43efa734225fccc8f864e809a8787bafbe3710f48ba51a9ce51e9b4