Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2940837b66f32ec…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 20:13:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: de2a4564d3e196c6a9f998634c72f052 SHA-1: 1f1770ac09c2dabf57a78831682907c9d2f69c9c SHA-256: e2940837b66f32ecc8f65b126439ce6a8b18578ff77d1e1b9d9f35ff55f5b221
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a lure of free game hacks and gift cards to entice users. It contains multiple embedded URLs, including a primary malicious redirector at http://netcdn.tw/app/431946152/robux-free-gift-card-game-hack, which is flagged as known malicious infrastructure. The document body and heuristics indicate a social engineering tactic to drive users to potentially harmful websites.

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/robux-free-gift-card-game-hack In PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/roblox-html-hack_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/roblox-free-t-shirt-template_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/game-guardian-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-promo-codes-roblox-not-expired_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/how-to-hack-someones-roblox-on-windows_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/flame-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/free-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/cheat-codes-roblox-mad-city_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/roblox-highschool-money-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.jewelspell.com/uploaded_files/userfiles/files/roblox-shirt-template-free_GM431946152.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_off0000300f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300F 22352 bytes
SHA-256: db74a8386f9c716820713b312410a1fec911158f28a3714a40c7dd24a41b7806
font_01_sfnt_off0000621b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621B 19112 bytes
SHA-256: 9469897dff8cab28ffda57ea4fb04243aaf5b849cb1d333b453ecf02c9debdd7

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