Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f31e63a69b1285…

MALICIOUS

PDF

45.4 KB Created: 2021-06-11 01:39:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 63ac780795058b6cc0c796e6f606b252 SHA-1: 15f8fca7ea4866d8d9f30f500ce57d66ad8d75b6 SHA-256: e5f31e63a69b1285b46b0f2b3573a924ef42b44ae3e57394c51aa85f311aec24
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9864

Heuristics 4

  • 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.
  • 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.tw/app/431946152/roblox-color-name-hack-game-hack PDF link annotation
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/hack-100-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-hack-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-how-to-get-free-robux-in-pc_GM431946152.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_off00005113.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5113 26604 bytes
SHA-256: e436218809d45890fd5dc673e307965d9473e73bbedb1490e83fcd6a952ff027
font_01_sfnt_off00008e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E89 18440 bytes
SHA-256: 6ea259ef64acfd14f5a5a677fe64d62384779880d34ab0d7be7ad1c241d1159d

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