Malicious PDF — malware analysis report

Static analysis result for SHA-256 221be32e450aef6f…

MALICIOUS

PDF

44.7 KB Created: 2021-06-11 12:19:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f1106f078c88ce30317e269631300f58 SHA-1: ad71afaa1d5f4c8a01f0e803b11764eb1e416699 SHA-256: 221be32e450aef6fe27d098656dc78bf0c99f2c44d810cd164633786c68d4001
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a malicious URL. The ML classifier strongly indicates maliciousness, and the embedded link is a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user interest in free in-game items to redirect them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-robux-with-cheat-engine-game-hack PDF link annotation
    • http://digilib.stimata.ac.id/repository/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-dynamic-ship-simulator-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/comment-hacker-roblox-facilement-sur-pc-2021-en-francais_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-kid-friendly-no-human-verification_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_off00004ed7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ED7 25284 bytes
SHA-256: ea984b62e6cfb92943fb365071d0618ccb96b02bd265bed728b5ad464d19d4d7
font_01_sfnt_off000089ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AD 19116 bytes
SHA-256: dc6d861335a7c37b74bb26898481a27a1b1e64ec71db653410a275c9cfed10be

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