Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58c2057a54ce4d5…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 05:47:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b4bf3ae7f62d0b17151d898560ba2f0b SHA-1: 5f0b0810d903871d4e47fa0dbf000a2e9a1f7782 SHA-256: d58c2057a54ce4d548d5f72d3800b7860523f1710faf59afc16bfb4caf549a24
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites that advertise game hacks and generators, such as 'apk-coin-master-hack-game-hack'. The ML classifier strongly indicates maliciousness, and the presence of these lures suggests the document is designed to trick users into downloading potentially unwanted or malicious applications. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/apk-coin-master-hack-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-prices_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/100-working-free-roblox-coin-gen_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/what-does-e-free-mean-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hackcom-for-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/www-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-assassin-hack-coins_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-minecraft-coins_GM479516143.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_off00002f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1A 22900 bytes
SHA-256: 6c7b93208e021635b849b4f736e3aac71a602e800849e20d4e2f710e9e36e558
font_01_sfnt_off000061c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C1 18180 bytes
SHA-256: 02092733737bc01a074e4b086c3b9816d726ecd0acc13f0522c2cc892addd8db

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