Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3cd07a994e10ec6…

MALICIOUS

PDF

43.5 KB Created: 2021-05-12 02:32:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5217335e1257637cf8ec75aba45010d1 SHA-1: e48980ddca96b3a541f6912b2e64eb0d1d6c798f SHA-256: f3cd07a994e10ec6836ff5949396edd5ec62f2d45e3192076176af43426990f6
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 0.9969

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/431946152/can-u-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.xyz/app/431946152/can-u-get-free-robux-game-hack PDF link annotation
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-hack-dot-xyz_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_003_off00004e27.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E27 25104 bytes
SHA-256: a974c7229fa52746804981f4098f637a7f1262c6f9c934cbc53e61ce3d40540d
font_01_sfnt_off00008720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8720 18532 bytes
SHA-256: 35bb0f01f69d1b5e790ed5f4c0eeb98998139975dc1eb58b588dc01b9002bbc1

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