Malicious PDF — malware analysis report

Static analysis result for SHA-256 537604fa30fe9b40…

MALICIOUS

PDF

44.9 KB Created: 2021-05-14 22:04:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d7f317e2809ec0fb23e7dab0b0b19e59 SHA-1: 03d38a56caa2c3939b3a5f5022554e6b8bed7642 SHA-256: 537604fa30fe9b40da2e59ad36b07136a0d60704c44f05c316144cc744477455
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that are designed to lure users into clicking on them by promising free game currency or hacks. The primary link, https://netcdn.xyz/app/431946152/claim-free-robux-game-hack, is flagged as a game hack redirector. The document body, though heavily obfuscated, contains references to these lures and the authoring application, suggesting a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.xyz/app/431946152/claim-free-robux-game-hack PDF link annotation
    • http://badboybiteaway.de/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://badboybiteaway.de/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://badboybiteaway.de/images/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://badboybiteaway.de/images/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://badboybiteaway.de/images/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://badboybiteaway.de/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://badboybiteaway.de/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://badboybiteaway.de/images/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://badboybiteaway.de/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://badboybiteaway.de/images/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://badboybiteaway.de/images/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://badboybiteaway.de/images/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://badboybiteaway.de/images/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://badboybiteaway.de/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://badboybiteaway.de/images/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://badboybiteaway.de/images/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://badboybiteaway.de/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://badboybiteaway.de/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://badboybiteaway.de/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://badboybiteaway.de/images/roblox-hack-site_GM431946152.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_off00004d30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D30 27884 bytes
SHA-256: 17e3db49a75b1fe0a66d1044a3ac4d953caa3507d1abb343bac6f34538804656
font_01_sfnt_off00008c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C71 18696 bytes
SHA-256: 5cf9f9319346d61d0cee7eea738a99b5b91b4687cc89c43f6f5509699f250cff

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