Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a93de8ae84bab3d…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 18:39:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1963926e9412345141f63cb48384d811 SHA-1: cdb28945bd53fd2dc3ed63b72b8033bae5599d2e SHA-256: 5a93de8ae84bab3d0d8e13fead1c4e9b412e14562b20a09ab3450bd6c1b72f5f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of free game currency and hacks. The primary malicious link, http://netcdn.tw/app/431946152/free-robux-no-verification-2021-android-game-hack, is designed to lead users to potentially harmful content. No scripts were extracted, but the document's structure 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/free-robux-no-verification-2021-android-game-hack In PDF document text
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-robux-hack-2021-ios_GM431946152.pdfIn PDF document text
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-robux-hack-tool-download_GM431946152.pdfIn PDF document text
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/earn-rbx_GM431946152.pdfIn PDF document text
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/spin-coin_GM406889139.pdfIn PDF document text
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/coin-master-free-coins-hack_GM406889139.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
font_00_sfnt_off000031cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CF 22404 bytes
SHA-256: 73ef723d39beb65543e37af8fee13f2a84a135945d54571727e179b50cc59782
font_01_sfnt_off000063d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D3 19648 bytes
SHA-256: fddc38f60f29949e87a17df7f7945f6cf104ea1bd46a51d994ebbbbf43946b8f

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