Malicious PDF — malware analysis report

Static analysis result for SHA-256 add8db1a26245ac5…

MALICIOUS

PDF

44.9 KB Created: 2021-06-13 23:33:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b67f8df21c0efa8991fbeb55975a2558 SHA-1: 00b0961200d1743311e20d145d87514fdfa94d21 SHA-256: add8db1a26245ac5a23e9a13bda1df46eb9a2ab46b548286d38ae0c6dbffec90
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 0.9632

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.co/app/431946152/mac-roblox-cheat-engine-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/roblox-free-head_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/tiktok-views-free_GM835599320.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-followers-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/asshurt-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-ad_GM406889139.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_003_off000049b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B5 24296 bytes
SHA-256: 55baeca6dd8d3b00791b0e19aa018deab136fb76d1587e823698aa8854ef7aa8
font_01_sfnt_off0000817d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817D 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2B 18888 bytes
SHA-256: c0e76fb9ea23fd19900bfc3049b1200f90027e2d4b6185b7ffbafc0c7fdb2a7a

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