Malicious PDF — malware analysis report

Static analysis result for SHA-256 943945452d4854cb…

MALICIOUS

PDF

45.6 KB Created: 2021-05-14 00:01:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fdc8cd10377cfa35790d75082649246b SHA-1: 2c314eab65328f1fb289eb9c7bcfab39d51f8315 SHA-256: 943945452d4854cb780c53e99dbd0f9b504842fcb0d555031e44dc21e06b4fca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically targeting users with lures related to game hacks and free in-game currency. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

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 https://netcdn.xyz/app/431946152/roblox-builders-club-free-game-hack In PDF document text
    • https://ivalue.tw/files/ckfinder/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/free-account-roblox-with-robux_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
stream_003_off000048c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C4 31440 bytes
SHA-256: 7a1c970a12084a87703d0d754dd29d18a374b07eae8465dac2f66d8d22bbef41
font_01_sfnt_off0000901a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901A 18384 bytes
SHA-256: ca5233fc9ce80ece0aee0c96fa35d529a08b6cb3fb28871df95ba3e8db8004f0

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