Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efcf0e270780a9e…

MALICIOUS

PDF

42.0 KB Created: 2021-05-13 16:03:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ad8bedd611d6287dab7f384d8db2e624 SHA-1: 1c689625f399e7440f876134904960bbcd189ce2 SHA-256: 0efcf0e270780a9e6ea43fe1d463c8c2b6faf07cc436d6b4bfeb9b3102906746
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/431946152/free-robux-hacker-us-game-hack PDF link annotation
    • https://library.univthamrinaka.com/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/robux-game-com_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-account-taker_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-free-spins-link-2021-today_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_off000048ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48AC 24884 bytes
SHA-256: ae5d63484a38ea4e8b2a1d97219c891f2a6281d4bd66e46febe279d4f393564c
font_01_sfnt_off000080d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D1 18600 bytes
SHA-256: be32b0f906764c1f2317decc7ac5a24a5975e1ace61028a3a9703984df87bb8b

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