Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab58c6380321c175…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 15:53:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 585ac9b3117373fce8eb4c2b9a81b80e SHA-1: cff9f0557104d83fb25c1acc6e422999d0d2a4a3 SHA-256: ab58c6380321c1752ca0f37e26e0340e842889b775e5ed00321840e58d984705
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains multiple embedded URLs, with the primary one being http://netcdn.tw/app/431946152/free-robux-not-a-scam-game-hack, which likely leads to a malicious site for credential harvesting or further malware delivery. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and redirection behavior.

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/431946152/free-robux-not-a-scam-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan//repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-promo-codes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-black-hoodie-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-weight-champion-hack_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-cheats-and-codes-for-pc_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CDF 22224 bytes
SHA-256: c8a3ecaffc79223dd74fa88f86dd00e32836da96fa2eeddc27fa2bde732e68a5
font_01_sfnt_off00005e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3E 19080 bytes
SHA-256: 14e01471e6a07db1a68c511ee00ed8ed146bd69de2dd1952b6465b95f794ce32

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