Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9767db9aa05d28…

MALICIOUS

PDF

43.5 KB Created: 2021-05-20 03:19:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: af977b233fa5ad9938170193e6efcef6 SHA-1: 4bb03c9363bdb5b56f057d58eedc657f09b0651f SHA-256: aa9767db9aa05d287f431d4ab097a6767afd269f2a725827e378d2aff8f6d3fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Roblox Games Free Game Hack'. The heuristic PDF_GAME_HACK_REDIRECT_LURE and PDF_MALICIOUS_REDIRECTOR_LINK confirm this behavior. The ML classifier also flagged the document as malicious with high confidence. The document likely serves as a lure to redirect users to potentially harmful content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-games-free-game-hack In PDF document text
    • http://elektrofahrspass.de/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/robux-download_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/wurst-commands_GM479516143.pdfIn PDF document text
    • http://elektrofahrspass.de/images/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/tiktok-free-save_GM835599320.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_off00004884.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4884 27460 bytes
SHA-256: 085804628fbeefa415438b5d2dddfd0f20b6c4020ff4499e06ddb04f1038e71c
font_01_sfnt_off00008731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8731 18436 bytes
SHA-256: c854a6c24cd9397543535c319deb2c67afb6e9d7a93f095be0a0206a19e96549

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