Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e175737c25b2f2…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 06:46:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 42d87ab6dd4b1dc61ff8e69ed63b77f0 SHA-1: 7c5a6e27837582790af06c85411a6e821b99d182 SHA-256: a6e175737c25b2f2a392d611c4ca5f75740af1d20b38ca3dffd19b33606ec11d
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 0.9832

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/how-to-hack-roblox-to-get-free-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/how-to-hack-roblox-to-get-free-robux-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-hack-november-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/pubg-uc-buy_GM1330123889.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-spins-game-download_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_off000052fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FB 27256 bytes
SHA-256: a9301b80bb8782403914191b61d339645a72b7c98adc236da4afd7cdbfd9659c
font_01_sfnt_off00009106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9106 18756 bytes
SHA-256: a768fd9037f2962d7d468f6b0310abba3890de72b41426d235b5de2790bab1ac

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