Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87f3ac743a5f7e2…

MALICIOUS

PDF

35.0 KB Created: 2021-06-26 17:02:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf4b3b9aae9443ec43523d7926024cc0 SHA-1: 5305aaa40eecdd36d843a8b053fbe9b67666e32c SHA-256: f87f3ac743a5f7e2624f95d78d4ae6b43055355ab9f0696dec53eedf36044215
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free Robux generators' and game hacks. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and document content indicate a social engineering lure to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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/free-robux-generator-2021-android-game-hack In PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/hack-for-roblox-in-game_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/did-tofuu-het-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/free-robux-no-survey-real_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/free-roblox-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/roblox-jailbreak-free-vip-server-link-2021_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/roblox-hack-apk-mod_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/how-to-hack-roblox-on-xbox-one_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/http-roblox-hack-no-varvaction_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/free-robux-stream-youtube_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/roblox-1x1x1x1-hack-music_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/cool-roblox-avatar-free_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/roblox-jailbreak-wall-hack-download_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/how-to-hack-people-on-roblox-youtube_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://oghousesgalore.com/wp-content/uploads/fsqm-files/roblox-script-executor-free-download-2021_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_off0000304d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304D 22404 bytes
SHA-256: 05b45c419c2108c6b1651c3aa3efad3e66ec1f6b88eadd6182a9460c9362ef91
font_01_sfnt_off0000621d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621D 19516 bytes
SHA-256: 10da643cf9dde604cf155259ffb077da39c2cfd80da055a96b4da44aa6a98e01

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