Malicious PDF — malware analysis report

Static analysis result for SHA-256 2456bdf3e460beca…

MALICIOUS

PDF

32.5 KB Created: 2021-06-18 05:15:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a1c686359caa59d17a8498c4d1ebb76f SHA-1: 3ef19256c967d1b1fa1affa1512fca43ec1416c0 SHA-256: 2456bdf3e460beca2f1d78ce2dac7e418266b1d81fd6cdb4484c177f0a4c9822
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous URLs and text referencing free Robux and game hacks, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests it is designed to redirect users to malicious sites. The document body explicitly contains a call to action to access a 'ROBUX GENERATOR'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-cheats-2021-game-hack In PDF document text
    • http://croatia-flyfishing.com/files/dodgeball-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-hack-july-2021_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/114-4-hacks_GM479516143.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/roblox-ios-app-hack_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-promo-codes-2021-august_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/roblox-hacked-accounts-list_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_off0000288c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x288C 21972 bytes
SHA-256: 4a026505d0ae9a58155424c209e56a6e7f7cbfc473dfff296960d8e95bb2cfe6
font_01_sfnt_off00005936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5936 19388 bytes
SHA-256: 66271f67ace1c85642c4ae7fb36e1d06fa04df95752da77eb150168262ec74ae

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