Malicious PDF — malware analysis report

Static analysis result for SHA-256 36292fb6633dd5d9…

MALICIOUS

PDF

34.7 KB Created: 2021-06-20 17:52:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 23a09ab11706619d58c1f482101ef68f SHA-1: 11452adfe0916406c38663e1452198212ecccec6 SHA-256: 36292fb6633dd5d92300f6a121a8edd17392e8e4a0f8d6d512ca324a4bb71bd3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are identified as malicious redirectors, often disguised as 'game hacks' or 'free generators'. The document body explicitly mentions 'Why Do Robux Hacks Ask For Verification' and includes a direct link to a suspicious URL, indicating a lure to trick users into visiting potentially harmful sites. The presence of embedded URLs and the ML classifier's high confidence score support the malicious classification.

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/why-do-robux-hacks-ask-for-verification-game-hack In PDF document text
    • http://fotoflas.gr/images/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://fotoflas.gr/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://fotoflas.gr/images/roblox-player-radar-script-hack_GM431946152.pdfIn PDF document text
    • http://fotoflas.gr/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://fotoflas.gr/images/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://fotoflas.gr/images/free-robux-hack-on-phone-no-human-verification_GM431946152.pdfIn PDF document text
    • http://fotoflas.gr/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://fotoflas.gr/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://fotoflas.gr/images/roblox-bird-simulator-hack-script_GM431946152.pdfIn PDF document text
    • http://fotoflas.gr/images/how-to-earn-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://fotoflas.gr/images/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://fotoflas.gr/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://fotoflas.gr/images/how-i-get-free-robux-rbxrewards_GM431946152.pdfIn PDF document text
    • http://fotoflas.gr/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://fotoflas.gr/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://fotoflas.gr/images/free-vidoe-star-egg-roblox_GM431946152.pdfIn PDF document text
    • http://fotoflas.gr/images/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://fotoflas.gr/images/piano-keyboard-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://fotoflas.gr/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://fotoflas.gr/images/getting-robux-free-for-roblox-no-paying_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_off00002f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1C 22188 bytes
SHA-256: 85f0ec60c9e080154796a92330dda8b394cb9516a57bd476212160f9484c888b
font_01_sfnt_off00006018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6018 19956 bytes
SHA-256: 2ea8fa4dafb5392e23f8dd29c24bd914fbc3e05652d5b52a4e7bfd399fd2ea38

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