Malicious PDF — malware analysis report

Static analysis result for SHA-256 aadf0e42c0fd8935…

MALICIOUS

PDF

45.2 KB Created: 2021-06-11 06:39:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: dd526510350e28e72e0664e7894780c9 SHA-1: b62a02abca5911a6564a0c71c408e77510fe8160 SHA-256: aadf0e42c0fd8935ba70d99174d0d7e03a538c0aa3647c39681141b086964a77
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'game hack' redirector, specifically targeting Roblox players. The embedded URLs, such as 'https://netcdn.tw/app/431946152/best-free-items-on-roblox-2021-game-hack', are designed to lure users into clicking, likely to download further malware or engage in phishing. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to exploit user interest in game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/best-free-items-on-roblox-2021-game-hack PDF link annotation
    • https://opac.heritagejkt.org/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/robux-hack-generator-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/cheat-engine-roblox-hack-prison-life_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-free-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-rs16-5-hacks_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_004_off000051e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E5 25928 bytes
SHA-256: 556810e3136f39b3fd4a300613ea9d25b4fc5e8d75f3de8f25a6bfaecb46249f
font_01_sfnt_off00008ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE9 18716 bytes
SHA-256: 54cd0b30e260fb500bea5585b0f7848eea7ad11f4bb5ef7d5b5680e71a880732

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