Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3d25025fb1d082…

MALICIOUS

PDF

33.1 KB Created: 2021-06-20 19:23:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f0670d62d1d765bed5fd7e32601433ae SHA-1: 4af7c3da15dac9f340ac30651dca8802cdf60702 SHA-256: 4a3d25025fb1d08277dc61f039047bdfd5ed59b0dac230bdee699750b7f94b50
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The ML classifier also flagged this PDF with high confidence. The embedded URLs and the document body content strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-stuff-for-roblox-2021-game-hack In PDF document text
    • http://linens.kiev.ua/images/robux-best_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/cheat-roblox-free_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/greenville-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/roblox-juego-hackear_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/roblox-old-version-free-download_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/roblox-free-robux-enter-password_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-get-free-roblox-badges_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/install-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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_off00002b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B70 21800 bytes
SHA-256: 8b97b354df4466a05e952e45a779a9b73e4e082786627f3e944c1dc3b7e292dc
font_01_sfnt_off00005b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B72 19296 bytes
SHA-256: c0b18516182658e05c66bfa3229cd492a4a421ee40c4629494836dfb257b5c42

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