Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3badaa06860237…

MALICIOUS

PDF

35.9 KB Created: 2021-07-06 06:53:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7ffaff45834c942ab30489f8f4b86b42 SHA-1: 20746872ed9b9c9044ad6e20b3be1426f1450b15 SHA-256: 1a3badaa068602373b286b8947657126f915ef61051bfc102e095db0f71d25b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game currency and hacks, specifically mentioning Roblox and Coin Master. It contains embedded URLs that lead to a malicious redirector infrastructure, identified as http://netcdn.tw/app/431946152/how-to-get-roblox-premium-for-free-2021-game-hack. The document's structure and embedded links suggest an attempt to trick users into visiting potentially harmful sites, likely for credential harvesting or malware distribution. No scripts were extracted, but the PDF's nature and embedded URLs strongly indicate a phishing or scam attempt.

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.tw/app/431946152/how-to-get-roblox-premium-for-free-2021-game-hack In PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/are-you-allowed-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-hack-client-side-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/weird-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-snyapse-free_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/robux-free-promo-codes_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_off00003310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3310 22400 bytes
SHA-256: ae4857468f00fc99d3ccd9160fa645d8f80a5637a2903f2193ee2491822532f3
font_01_sfnt_off00006498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6498 19992 bytes
SHA-256: 5d92c0ac708cb6372069878ce274a0583dd4db4fed5f7a9ab4827dfd753440d4

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