Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c3f7cd6be93d84…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 05:20:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4f79829b9c6822ff62b35695fc5b8232 SHA-1: e6bd35f940e4111c3103949bd8d25907ffb61ec7 SHA-256: e4c3f7cd6be93d84ee79b86c9cf2731870db0bffde4fef4e9246ff4466ea4afb
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-tips-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/free-cloth-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-in-roblox-legendary-football_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/robux-hack-download-android_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-dress_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-robux-secret-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/swagbucks-for-free-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/turkey-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/cheats-for-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-robux-with-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hacks-on-roblox-to-change-ur-look_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-accounts-2021-november_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/robux-in_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-apk-35-11_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
font_00_sfnt_off000031f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F4 22960 bytes
SHA-256: 531848a5c9e01e992206904d2f8be51cbd01625f3199abecf7630f7a09f6ec95
font_01_sfnt_off0000654e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654E 18008 bytes
SHA-256: 738077661c3bdde97a3269a858b9597e7cbd9fef58d40ae3bb1e08b9d930261d

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