Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9835c7ae794f134…

MALICIOUS

PDF

34.1 KB Created: 2021-06-23 02:22:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0c04f0ed96fe9618b99bb1a3b16a362a SHA-1: 507e3c62d5a2006d958e9bf76d63e055a3367e6f SHA-256: d9835c7ae794f13435bd863c78410773e8d79f6ff134f0cc7cad4f37946b5220
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games. The document body and embedded URLs strongly suggest a lure to trick users into visiting malicious sites, likely for further malware delivery or credential harvesting. The ML classifier also flagged this PDF with high confidence.

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.co/app/431946152/robux-sans-hack-game-hack In PDF document text
    • http://huananhai.net/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://huananhai.net/images/free-roblox-robux-hack-generator-no-survey-tool_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/moon-active_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/free-robux-generator-no-adds_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/free-ghost-beret-roblox_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/muscle-simulator-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-free-robux-2021-2-4_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-free-items-roblox_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/how-to-still-cheat-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/royal-high-school-roblox-how-to-get-free-mony_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/robux-robux-robux-free-code_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/free-admin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/smurf-backpack-gives-free-robux_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/real-free-spins-for-coin-master_GM406889139.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_002_off00002e77.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E77 22696 bytes
SHA-256: e974aa05373de5e1b127436a7ae07b0c8b5cdb73722bbd00983a6d125a5461cb
font_01_sfnt_off0000613c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613C 18724 bytes
SHA-256: cc353eae17171ecd2d9d73871fe8a31fe9351747bf9b8d601e5b7e5ce0db6578

Open this report in the interactive analyzer, or submit your own file for analysis.