Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8967e122d199c33…

MALICIOUS

PDF

49.4 KB Created: 2021-06-03 07:25:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1f01f0e7fffd354e167c9e81bd6a93c3 SHA-1: 4806e154e5dc87373fddba4d61c801f235fb24c1 SHA-256: c8967e122d199c33a7fcc27fa7526fde5c9a85e53151cf567fb050c8a0a0a472
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 0.9796

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/431946152/robux-hack-top-2021-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/rbx-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/cool-free-roblox-outfits_GM431946152.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_off00005275.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5275 28168 bytes
SHA-256: 316d544d8441e069d040cb748174671adfb4ab62bba042b25f699867421c3227
font_01_sfnt_off000091de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91DE 3040 bytes
SHA-256: b664012e81d91e5ca044c80827e5e9fb0aed624c77a228163f778dfbce32b64a
font_02_sfnt_off00009c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C69 18828 bytes
SHA-256: ff599bdf24b4091e86add11debcaf90ef991ff9b9f82bbca09e70d7ecf470403

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