Malicious PDF — malware analysis report

Static analysis result for SHA-256 49acaa64cf9bbfa7…

MALICIOUS

PDF

44.7 KB Created: 2021-05-14 18:59:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c9961f266731cf87dea5da351eeddfcd SHA-1: cd1bc0b777b45396168871cedbaa9c22e1efa706 SHA-256: 49acaa64cf9bbfa72b47eafa21dac31049b5cfe3683a2fc1d4291ab731dd96cb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'game hack' lure, specifically mentioning Coinmaster spins. The embedded URL and numerous other URLs point to sites offering game-related cheats or generators, which are common pretexts for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious resource, likely for initial access via a phishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/free-coinmaster-spins-game-hack PDF link annotation
    • http://dshikr.ru/images/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://dshikr.ru/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/how-to-get-free-robux-without-downloading-apps_GM431946152.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
stream_003_off00004956.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4956 25312 bytes
SHA-256: 421b59b5fc16ffccdbdf7c8aaef8d752e2b460d10d026dc83486ea153891a70f
font_01_sfnt_off0000830d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830D 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBF 18148 bytes
SHA-256: ba216d9844178078b6875fb667333aee6c8c15dd3bf3ba058f093208140005b7

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