Malicious PDF — malware analysis report

Static analysis result for SHA-256 a51e02d715b88be1…

MALICIOUS

PDF

36.6 KB Created: 2021-06-22 21:02:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 47fc4a0eff713bdb017f805d374a53db SHA-1: aafde11ee0900de6a989939ffeedd8812b73bfd5 SHA-256: a51e02d715b88be1dad6eb80a534e252e12708af655fa225fb049613d0937019
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to known malicious infrastructure. The document body and embedded URLs reinforce this, suggesting the primary goal is to trick users into visiting a malicious site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/can-you-get-banned-on-roblox-for-using-cheat-engine-game-hack In PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/roblox-reddit-hacks_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/free-hack-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/roblox-hack-steal-robux_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/luis-coment-robux-free_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/roblox-hack-bid_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancedcube.com/uploaded_files/userfiles/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003415.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3415 23356 bytes
SHA-256: d19e211490f0de09ff4ea6c84b461eae112c965e4e1cdfb422038540022f2653
font_01_sfnt_off000068b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B8 19516 bytes
SHA-256: 4cde741f799ad2202ef25cc05d57b844e40160f81cde0ecb6d6c19ca963f6c29

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