Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f7cdfad456c221…

MALICIOUS

PDF

34.1 KB Created: 2021-06-18 03:20:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2f73ef2c43f065a6b72668546e30cccf SHA-1: 728c88ce6a5f5c43a77cb64562a69de226514efd SHA-256: 43f7cdfad456c221b83417a58ef4eea94bc01d75107a4a9e8f489cb28ceb68bf
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 'game hacks' and 'free currency' to lure users. The primary redirector URL is http://netcdn.co/app/431946152/hacks-in-thessaloniki-international-airport-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

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/hacks-in-thessaloniki-international-airport-roblox-game-hack In PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/hacker-warning-roblox-id_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/roblox-free-online-play-as-guest_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-spins-on-coin-master-app_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
font_00_sfnt_off00002f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F94 22032 bytes
SHA-256: 16468d494df91938dff244e5b441aeb3abb42fd0b096aef6bcbdd83eee9d4933
font_01_sfnt_off00006064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6064 19036 bytes
SHA-256: 6400555da5b6ef05c249ae08ab8ca8a3bc4f4536bff5858f99813a8c364535e4

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