Malicious PDF — malware analysis report

Static analysis result for SHA-256 143861e8fbdabb97…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 08:32:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: da0614e5f6ee58889ad6bac8b486ccfa SHA-1: fc14088e7e531a36bef782dc1c664f83eeea1574 SHA-256: 143861e8fbdabb975382efa0ab2677a5b629126c834a4e51f5dcdf42e1a739b6
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/406889139/free-spins-and-coins-coin-master-2021-link-game-hack PDF link annotation
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-without-human-verification-and-email-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/easy-way-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-hack-level-7_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-script-injector-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/tiktok-free-website_GM835599320.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/a-free-game-of-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/server-sided-cheat-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/hack-robux-ilimit_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_off0000300d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x300D 22344 bytes
SHA-256: 4ebdbda477ad6edd20fce933ce7d0569919245a2c07ebfa3acfd4aee40ca59b9
font_01_sfnt_off000061a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A9 18920 bytes
SHA-256: 5da8567ac5cad1a9e8b19f4308895a295b9244689bea2bda45786747592bc9c5

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