Malicious PDF — malware analysis report

Static analysis result for SHA-256 da276d99e1e65494…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 03:32:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 205dd1c8a3d4956b919e4a982d29697e SHA-1: c83f2d420461edaaba38c9b452e17c2615161273 SHA-256: da276d99e1e654948a61e96a5a709e3cfc75286cb115baf00451654fd3ac2025
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to a malicious domain, masquerading as a game hack generator. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a download button lure further support this. The document's content and structure suggest it is designed to trick users into visiting a potentially harmful site, likely to download further malware or engage in credential harvesting.

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/boku-no-roblox-hack-game-hack In PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/how-to-get-free-stuff-in-roblox-2021-september_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/free-robux-card-hack_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/cheat-engine-roblox-survive-the-disasters_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/roblox-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/how-get-free-skin-in-csgo-roblox_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/roblox-free-login-and-password_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/hacks-para-tener-robux-gratis_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/hack-any-roblox-games-using-dex_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/free-anime-roblox_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/minecraft-fly-hack_GM479516143.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_off000033b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B0 22216 bytes
SHA-256: 520d659d866b7b2fa9dc840139566ff70cdb6c2896fd1a7e4d32b560a8581a53
font_01_sfnt_off000064fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FB 18796 bytes
SHA-256: 19135353552efac95f1c00fc10c19e7b17473ce31d967bef669c8f4fb6ca84ac

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