Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d592c247b6b6c48…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 09:57:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 01bbbe859d13b7c0a5b99c350fbe7338 SHA-1: 10eed347e0f98a30261b962da822a68e96f55ec4 SHA-256: 3d592c247b6b6c48580d93fd103f79de95d3f8bcab1b175f1d9126e37c53c7c6
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a seed-phrase/secret-recovery lure. 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 0.9865

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.online/app/406889139/card-hack-in-coin-master-game-hack PDF link annotation
    • https://creationegyptco.com/userfiles/files/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/grabpoints-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-online-free_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-daily-spins-and-coins_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_004_off00005065.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5065 24268 bytes
SHA-256: 43e16ed995e0512a8deac7f36829700917e4db913c1763dd3fd5f7aecc51b8fc
font_01_sfnt_off00008784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8784 17888 bytes
SHA-256: eac9cb42de6513dc6552a50abee069bf35bf7768323d30e076f8ef6ec09f6223

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