Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f7c51a7eb0773e…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 06:18:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 759493aa2730f0f236686684f6e52e38 SHA-1: fbcdf422766961e19bb7d57eebe134f11e78d570 SHA-256: 14f7c51a7eb0773ec4ef25461be84373e7ddf8dcaf6db59b07eb17b397fc78a1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as 'game hacks' or 'free generators'. The primary link, https://netcdn.online/app/431946152/freerubux-game-hack, is designed to lure users into downloading a second-stage payload. The document body and heuristics strongly indicate a social engineering tactic to trick users into executing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.online/app/431946152/freerubux-game-hack In PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-make-your-own-shirt-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/roblox-play-as-guest-free_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
stream_004_off00004ef6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EF6 26688 bytes
SHA-256: 819cc938eb85e72dada2a68a8680045f651921af71cba6039822a1c9519dc1e6
font_01_sfnt_off00008b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B82 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off00009522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9522 17872 bytes
SHA-256: f4416bbc5f287efcbe31c7b4c704cc92a0ced0ddcdd2f5cfb5fb7d41fdf7fc1a

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