Malicious PDF — malware analysis report

Static analysis result for SHA-256 2750f158d8cd069b…

MALICIOUS

PDF

35.4 KB Created: 2021-06-21 13:27:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d640a526ae91da3c0bbbdf33eb4b1c94 SHA-1: c0024ddb9ee437fd0ee87a7b186e1b27acc77a10 SHA-256: 2750f158d8cd069b65febb55568a71776f4dd72d255a98cee33f08d8c30e1d17
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free in-game currency and hacks for popular games like Roblox and Coin Master. It contains embedded links that point to malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/roblox-money-hack-2021-free-download-game-hack, which is designed to lead users to further malicious content or downloads. The document's structure and embedded URLs strongly suggest it is part of a phishing or malware distribution campaign.

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/roblox-money-hack-2021-free-download-game-hack In PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/join-the-group-for-a-free-sword-roblox_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-roblox-really-small-head_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/roblox-www-com_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-get-free-animations-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-get-a-free-dominus-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-robux_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-no-verify-or-download_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-do-you-grt-free-robux_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/epic-hair-free-roblox_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-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_off000030b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B4 22208 bytes
SHA-256: 9bcd9da5e4f5ee2b98e653b27ceff3fb82955bd33ecb872855122ed260305853
font_01_sfnt_off00006228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6228 20104 bytes
SHA-256: 6bac0339525f0e3ec6222d926997770a92482ae180c4f36048ac390c3124efd7

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