Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0487400437113d…

MALICIOUS

PDF

43.1 KB Created: 2021-05-13 08:01:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 222bdc4f0cd04e08dce7974c654a2daf SHA-1: bba92b4e9a7ebeedb5b17266cf375dcd7a2e13ae SHA-256: 1b0487400437113d7436e1febc3b059f33b65001af0ce1cea5514fa7d367de4e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/minecraft-pe-free-download-ios-game-hack PDF link annotation
    • http://www.rezbb.sk/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.rezbb.sk/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/toolbox-apk_GM479516143.pdfIn PDF document text
    • http://www.rezbb.sk/images/coin-master-free-coins_GM406889139.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_off00004b86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B86 25804 bytes
SHA-256: 8265dbc2dcf83c9253c31fffc5dd731a06c61ab044c01523e645a86c1a5981e3
font_01_sfnt_off000085a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A2 18444 bytes
SHA-256: 9eeecdfb23f1efa52cb61da16af6a6becaf737d5b15e06d56d5bb9cda3007ed5

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