Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28248760cbcd3d7…

MALICIOUS

PDF

34.0 KB Created: 2021-07-08 13:04:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 843450bba4ca6f710b9171e1cbc4c6e0 SHA-1: eaf6ec0c9f870349ee86f78900a4cf5ef0b43a85 SHA-256: b28248760cbcd3d7b304acbdee3e6a158aecc71043305a927782a60c527deadd
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/431946152/roblox-printables-free-game-hack PDF link annotation
    • http://ggmtc.net/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/pokemon-go-free-unblocked_GM1094591345.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/the-cheat-mac-roblox_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/get-free-item-in-roblox_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-food-empire-money-hack_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-how-to-walk-through-walls-hack_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/asshurt-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-robux-hack-generator_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_off00002df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF5 22480 bytes
SHA-256: e158642afee7dda9001fc04004142b9d90e8de294d414dd7218cb3582e3ca19e
font_01_sfnt_off00005fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE8 19028 bytes
SHA-256: 5f2f594151e0b08153158ab3eb68c79847db9c0319a43ac7edef6c56c0cde280

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