Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a00c2d39b749a42…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 06:17:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0d39621700bbd27b12eb33ba7eb582fd SHA-1: f07e15583ebd15e922835f239b718213afb98226 SHA-256: 2a00c2d39b749a424b0fadd95e48941a956113f2ef643a78d6a75b63cbe1e98d
122 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 brand-impersonation credential phishing. 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 0.9769

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.online/app/431946152/roblox40com-robux-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.online/app/431946152/roblox40com-robux-game-hack PDF link annotation
    • https://library.elkatarie.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-hack-no-human-verification-or-download_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/robux-hack_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/minecraft-mobile-free_GM479516143.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
font_00_sfnt_off00004fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FA1 24920 bytes
SHA-256: f30d68b9d7d0f9c1645476cea152f43dd165526066e0a681016c74309d7364bf
font_01_sfnt_off000088b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B7 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000095c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95C9 18420 bytes
SHA-256: 9bf7aeffe2314fd78c1d0f367561f23bde53ab00f4c8579179b32c1e4d583458

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