Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b4544b07796390e…

MALICIOUS

PDF

49.0 KB Created: 2021-06-10 23:53:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 249f180c8fb012f87e586dd7af5172e5 SHA-1: 2f3536ef1b7797dc0b6831994cd4fc4826a3f41c SHA-256: 1b4544b07796390e0d4bb70882a77c8a79fcc92d41b0f007351600ab37c64cd8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and embedded URLs that redirect to websites promising free in-game currency and hacks for popular games. These lures are designed to trick users into visiting potentially malicious sites, likely to download further malware or engage in credential harvesting. No scripts were extracted, but the high number of game-lure links and the ML classifier's strong positive signal indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/how-to-get-free-robux-kid-friendly-game-hack PDF link annotation
    • http://ansacare.com/images/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ansacare.com/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://ansacare.com/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://ansacare.com/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://ansacare.com/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://ansacare.com/images/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://ansacare.com/images/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://ansacare.com/images/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://ansacare.com/images/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://ansacare.com/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://ansacare.com/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://ansacare.com/images/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://ansacare.com/images/roblox-hack-hackerbot_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://ansacare.com/images/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://ansacare.com/images/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://ansacare.com/images/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50DB 27472 bytes
SHA-256: 414f0c2bd19445a7985621f77a2142d6514fd97721d57000df3a0eee40b4ff89
font_01_sfnt_off00008e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E18 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B29 18828 bytes
SHA-256: 259a29cb81e29e79060934b2643d9caccfe7486c1f351619ab07f5f03d5e2b11

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