Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf2d11d1570b243…

MALICIOUS

PDF

37.6 KB Created: 2021-07-09 19:27:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: adb134512c6eb70d3525d66df40b8e55 SHA-1: b16984110cd92eb4d4f8b7d4f9aa9f576cc003e4 SHA-256: bbf2d11d1570b2430e224ddff4c58f0749cd45876d2c230dbf51850bc59e8815
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs, including one pointing to 'coin-master-daily-spin-free-game-hack'. The ML classifier strongly flagged this PDF as malicious. The presence of a 'download button' heuristic further suggests a lure to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/406889139/coin-master-daily-spin-free-game-hack In PDF document text
    • http://croatia-flyfishing.com/files/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/roblox-robux-free-com_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/my-robux_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/roblox-hacks-hub_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/wie-hacke-ich-mir-robux_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/terminal-railways-have-a-train-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/new-code-hack-speed-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/como-instalar-hacks-de-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FD 23192 bytes
SHA-256: a4900c9befebefe43f3359d2944e329a24846a4d60ea6efbe4d85f0be864734d
font_01_sfnt_off0000656d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656D 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F52 18596 bytes
SHA-256: 4bd887bddad3707660fa4e91161c1a16423faf42318738ff8904c415139aa447

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