Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6fd4dfdb09edb5…

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 16:55:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a74d98f059fb2e748a497e0314feb993 SHA-1: bc5331053eb43bb698e2ee7b293ad05d4a786619 SHA-256: 7d6fd4dfdb09edb51b07da91acef5f728e5d6283b464d8f20f297aad05d71d98
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous URLs and text related to free in-game currency and hacks for popular games, strongly suggesting a phishing or malware distribution lure. The ML classifier also flagged this PDF as malicious with high confidence. The primary IOC is the URL http://netcdn.tw/app/431946152/blox-fish-free-robux-game-hack, which is likely the download location for a secondary payload.

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.tw/app/431946152/blox-fish-free-robux-game-hack In PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-jailbreak-how-to-get-all-cars-free_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/hack-robux-cheats_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/are-there-any-free-sword-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/lazyblox-com-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/como-tener-robux-gratis-sin-hackear_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-naruto-headband-roblox_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-phantomforces-flame-cheat_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/hack-roblox-com-2021_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_off00002df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF3 23068 bytes
SHA-256: 60eb1aa4c5159791eab7d8c3fa88333eaa0883c2e49ee32ce6f5481004e68e40
font_01_sfnt_off000061b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B3 19076 bytes
SHA-256: 3cf60c739c0884d91aaf202ef0ac6a46c83ef9e91b02a5e84cfbee5a7d00e491

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