Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e82436b23c719e…

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 02:02:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 66000bd222d4393b2a7770d51a7c4938 SHA-1: 3288f15e9d3e6ad3487e73b6032401f8bd26e8d3 SHA-256: 75e82436b23c719e3dd5ddb24f3cfbd1e6d1a2f916c036fba0ea2f506a157af8
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 0.9971

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.xyz/app/406889139/coin-master-hack-2021-apk-game-hack PDF link annotation
    • https://www.library.kysm.edu.my/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_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
stream_003_off00004a05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A05 24156 bytes
SHA-256: 4aa84991cea61d10a101d52d5a84b71ce8e1b1d237f646850c416b45478a9410
font_01_sfnt_off00008101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8101 18296 bytes
SHA-256: 0171898879de63f826772f1aaca43c4afb825f5f143e0263167d5c085c4f41c3

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