Malicious PDF — malware analysis report

Static analysis result for SHA-256 1978910b6c13c0a7…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 06:54:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 05495d56160da6bf5cbce201c2f134d2 SHA-1: 4e7b1bbafd68314d30103d8b82fe9d9ed7443adf SHA-256: 1978910b6c13c0a798ae65354bf2161e4c29498c60f298c8d82932259d0567bf
122 Risk Score

Malware Insights

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

The PDF document contains a high-confidence heuristic indicating it's a game hack lure, impersonating Microsoft to trick users. The embedded link directs to a suspicious URL, likely leading to credential harvesting or further malware. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a malicious intent to exploit user interest in free in-game items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/835599320/free-tiktok-followers-and-likes-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/835599320/free-tiktok-followers-and-likes-game-hack PDF link annotation
    • http://lib.kesdammedan.ac.id//repository/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/minecraft-free-download-android-apk_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
stream_004_off00004f75.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F75 24084 bytes
SHA-256: 42fb413e581ba8a90b14092d16d89ddcd1d75963dcf282d0f8d885afd74d64aa
font_01_sfnt_off00008684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8684 3124 bytes
SHA-256: b4d0a6f874623eca91bf5bc72a3cabb824ec4e9d69d3f61300b24fcbe1df707d
font_02_sfnt_off0000913e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x913E 17868 bytes
SHA-256: 3d92bf9f97e5112d292b407947535e704fb05ee4c3221ca2b39c5e27e22079fe

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