Malicious PDF — malware analysis report

Static analysis result for SHA-256 db44909ca7181d08…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 06:48:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 25c046bf7eae72be80b0d6d119b49baa SHA-1: 3315e8cf0c1b76c451d6434a74e666202053e349 SHA-256: db44909ca7181d0828a12f4eb095857e49deee0b3b223a521ee74997c9451992
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 0.9865

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.online/app/406889139/coin-master-free-link-spin-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-assassin-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-hack-mod_GM479516143.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_off00004e5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E5F 24668 bytes
SHA-256: 2d13fd752bb2fe13e63d95bc37a363cda411d5e4319a148a06d6d9969dbb4cdf
font_01_sfnt_off000086b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B7 18056 bytes
SHA-256: 73446086b7970e4c311ea7edd0e96fe93bb69e7a29ec1c6c70349cef1a9e8050

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