Malicious PDF — malware analysis report

Static analysis result for SHA-256 da1c314038026c7c…

MALICIOUS

PDF

33.3 KB Created: 2021-07-05 07:51:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 0ec4bfcb5b6e90291910bd601e856f81 SHA-1: 921f867462c50249d9f7d6577a064f10717d3450 SHA-256: da1c314038026c7cb627787ff771f2f62f2360c26efd93f9e8750addcacb07e1
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 0.9980

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.tw/app/406889139/guide--coin-master-free-tips-game-hack PDF link annotation
    • http://www.myresidence.lu/userfiles/files/how-to-hack-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/bucks-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-hack-roblox-jailbreak-on-android_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/robux-hack-validation-code_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-roblox-hided-head_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-exoliner-free_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-pastebin-hack-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-1m-robux-free-everyday_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/howto-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-rust-on-roblox_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
font_00_sfnt_off00002e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2F 22024 bytes
SHA-256: 73c99e36563f601fde1807d5163516038a8985ff850880a7b74a9ffa912a5310
font_01_sfnt_off00005ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE8 18488 bytes
SHA-256: 72a1917ae8e8a7f30c7b1d5c4ccc6edf0a552f82cfb4ec0142f59bc197696ebb

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