Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba890262cc981603…

MALICIOUS

PDF

33.6 KB Created: 2021-07-07 03:45:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d934eaf26bce36b605c11f7ac525b0ee SHA-1: 6af31a05d632685c24a2e6e6fc42605e83c7776c SHA-256: ba890262cc98160352e56bcb8b3a9d9baf4e9a12ebae4e71690e126445a371fe
160 Risk Score

Malware Insights

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

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple links to a malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/free-robux-come-game-hack, which likely serves as a gateway to further malicious content. The document body and embedded URLs strongly suggest a phishing or scamming attempt, masquerading as a generator or hack for popular games.

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-come-game-hack In PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/roblox-free-robux-club_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-games-like-minecraft-that-arnt-roblox_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/roblox-pizza-place-money-cheat_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-get-any-item-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/robux-app-hack_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/roblox-pet-simulator-free-game-passes_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-robux-javascript-pastebin_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/roblox-black-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-get-free-robux-by-playing-games_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_off00002ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDF 22144 bytes
SHA-256: 6ea10b3adf7510c81ffbb2f3a2b4d3dba82f89a06f7dc75aebb9dc7b728c418a
font_01_sfnt_off00005e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E75 18976 bytes
SHA-256: 20782bd0acfe52469dc9f14a315b4aee1c9563688044d1d6d3a516ef71528a8c

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