Malicious PDF — malware analysis report

Static analysis result for SHA-256 a51d35deed5771a5…

MALICIOUS

PDF

49.0 KB Created: 2021-06-01 07:43:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1ea214318732074e6631da17123ebbfa SHA-1: 98860c18bb1c94ba4069f76c8ae029bf24277d6a SHA-256: a51d35deed5771a584d8c87f2d056fb4daa3d55e14b794d91d64d41622b9d5ec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed to lure users with promises of free game items and hacks, redirecting them to malicious websites. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or redirection attack, likely leveraging embedded JavaScript for its malicious functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/free-robux-2021-game-hack In PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/roblox-ip-tracker-hack_GM431946152.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/roblox-jailbreak-play-for-free-online_GM431946152.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/roblox-grand-theft-auto-v-cheats_GM431946152.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/free-rainbow-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/can-you-change-your-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/free-20210-robux_GM431946152.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/tuto-comment-installer-des-hacks-pour-roblox_GM431946152.pdfIn PDF document text
    • https://rplcertified.com.au/wp-content/uploads/fsqm-files/youtube-how-to-use-cheat-engine-on-roblox_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_004_off000052ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52EA 33028 bytes
SHA-256: 991b24bab5cd1ab46ca8ab220c5867736a36a9575c90c6300456545aaec4264f
font_01_sfnt_off00009ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CCD 18416 bytes
SHA-256: a2c808792aaeb1607b9c3a91ae122c662faffffe8d42f3cf4118be6ccc5b3e7b

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