Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9617889f8461c5…

MALICIOUS

PDF

34.0 KB Created: 2021-07-09 20:23:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 38ea9695e9b936e02fb5a5ff020c0289 SHA-1: c7d2c2bb8216f268fba2723f0602a2e53f934e86 SHA-256: bb9617889f8461c5c45dfe50764afbdfcbd49bd3a579c8df0b64216aa3727756
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that lure users into clicking on a URL promising game hacks and generators. This URL, http://netcdn.tw/app/431946152/roblox-hack-site-game-hack, is identified as a malicious redirector. The document's content and heuristics strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites. No scripts were extracted, but the primary attack vector is the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-hack-site-game-hack In PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/tiktok-free-generator_GM835599320.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/how-to-hack-anyone-in-roblox_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/how-to-get-free-robux-legit-with-proof_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/alfheim-online-roblox-hack_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/globux-me-free-robux_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/haw-to-get-free-dominus-on-roblox-a-weeek-ago_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
font_00_sfnt_off00002f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F60 22052 bytes
SHA-256: 79d15ebf3025734e7756b7ae39e35cac64c501f4519f022441baf3440b5c04eb
font_01_sfnt_off00006046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6046 18880 bytes
SHA-256: 6798a5860b29af3a79a68d7c52601d34cb5f107bdf36f63a1b46f66fdb0dc288

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