Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc8f8c990afa3a4…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 15:49:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7863bc060d9c363ea0649c2dc9b7ee65 SHA-1: 80acaa75dc9c86a9f850b303aff5a2de8a99da2d SHA-256: 5bc8f8c990afa3a4045e46c2346a311b21caa552f07c5d5056a9f67ba5ee1096
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/479516143/wurst-hacked-client-112-2-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/tiktok-free-book-download_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-scp-site-61-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-any-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacker-roblox-wls2_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-from-offers-on-pc_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/adopt-me-roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-login-free-play_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacker-groups-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-maker-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-candy-id-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/break-free-roblox-music-id_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hack-ios-cydia_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-robux-2021_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
font_00_sfnt_off00002e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E13 22064 bytes
SHA-256: 4afb45092a466c7737d39c4204e76593b1c896062ac07c54254adc1ee6680088
font_01_sfnt_off00005ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDE 18840 bytes
SHA-256: bfa74a5eda28881e9308f4be3941fc30d3546b7d556835e2b2e73e76830f2da7

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