Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d07156bf36568f…

MALICIOUS

PDF

41.9 KB Created: 2021-05-12 14:12:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 249b3a7dc0f6d4edd3d07e62c316fc2d SHA-1: 6da0c14c41e1cedc631691988006f98d3fdd3e8e SHA-256: 12d07156bf36568fd6bb5b14eaf1c832d7cdd5cb145186a2d5f8864af9137b81
122 Risk Score

Malware Insights

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

The PDF contains a link that impersonates Microsoft and lures users with the promise of free game-related content like Minecraft server hosting. This is a common credential phishing tactic. The ML classifier strongly indicates maliciousness, and the embedded URL is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/479516143/free-minecraft-server-hosting-game-hack.
  • 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/479516143/free-minecraft-server-hosting-game-hack PDF link annotation
    • https://cleansui.com.tw/image/data/files/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.freenom.comHeyIn 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_off00004a0a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0A 24848 bytes
SHA-256: 6e25e1d873b4434bb76af2b75f0e76e5b375d92ac32fd0a1815dfbccf1905795
font_01_sfnt_off000081de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DE 18112 bytes
SHA-256: 3722fe831b56fbf324865bd98e985c80b873b4d61fb4aa2a64332cfc2a086223

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