Malicious PDF — malware analysis report

Static analysis result for SHA-256 9664cc32bf1aea5c…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 08:10:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 05348796dc7a3b792638d3934d5155eb SHA-1: 9f21c9d9e6cd3988296c188a63a0bdb8f128e95c SHA-256: 9664cc32bf1aea5cc3cf5d511c571876d9c3f70340588390ab27e897528542a6
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 0.9984

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/406889139/free-spins-coin-master-links-game-hack PDF link annotation
    • http://perpusfkip.upstegal.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/hacking-lessons-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/pokemon-go-free-coins-without-human-verification_GM1094591345.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/robux-free-pastebin_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/pastebin-roblox-vip-free-robux_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-ticket-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/hacks-on-roblox-app_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/project-alpha-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/command-bar-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-invincibility-hack_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-dungeon-quest-free-stats-reset_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
stream_002_off00002f16.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F16 22980 bytes
SHA-256: 1a1c3c4383a182b379d34289413168f6c84ebd6d58d2779469c4b10836f4aa28
font_01_sfnt_off000062f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F1 18344 bytes
SHA-256: bbd45a100c9fda56c98402c01c945e99ba5b23a8a144929349c4b2a582275d64

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