Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da64ba02c1a9aad…

MALICIOUS

PDF

34.0 KB Created: 2021-06-19 03:41:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d75a54b010855fd8c7b285aca6b32371 SHA-1: 253b911bb0699f66cc6199c2ceb9ef2e49ea4df8 SHA-256: 4da64ba02c1a9aadb12d7195832c155e87baa5552382155fb9ad4b88ce10ce06
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' related to Roblox Robux, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/best-roblox-robux-hack-game-hack PDF link annotation
    • https://hekl-software.de/images/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • https://hekl-software.de/images/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/free-roblox-gsmes_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/microsoft-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/free-roblox-builders-club-card_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://hekl-software.de/images/get-20212021202120212021202100-free-robux_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • https://hekl-software.de/images/pastebin-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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
font_00_sfnt_off00002f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F08 22264 bytes
SHA-256: 91434c6900f4e8d07168b11f8b0fcaacdaba5c43fb32bbe1fe7fb7578c4cee8c
font_01_sfnt_off00006086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6086 18712 bytes
SHA-256: 83cacfdce80047d3f92b3a6a8d69c09fdcb9cfcb457c39395b1c43c46a21d5fa

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