Malicious PDF — malware analysis report

Static analysis result for SHA-256 281d07a9de1b5861…

MALICIOUS

PDF

34.0 KB Created: 2021-07-07 10:37:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 31a4d91bbc82cfd2cba704db1cf9b7bd SHA-1: a305742b786d5c6cb23dbddbafeb7cacd7580124 SHA-256: 281d07a9de1b58616042adbbc0ef4ec48433332f5ec54daf9590e54e609bb44c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to malicious infrastructure associated with game hacks. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the lure of free game hacks suggest a phishing or social engineering attempt to redirect users to potentially harmful content.

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/406889139/mcpe-master-hack-unlimited-coins-download-game-hack In PDF document text
    • http://jjpremiers.com/files/roblox-dentist-game-online-free_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/free-jacket-roblox_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-no-human-verify-or-download_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/fencing-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-jailbreak-how-to-get-money-free-and-fast-lemms_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/roblox-tshirt-free-2021_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-do-i-hack-someone-on-roblox-with-edidthiscookie_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/hot-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/get-free-spins-for-coin-master_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_off00002f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F43 21872 bytes
SHA-256: 601a82afd123b9a03a2050bd4bdda55a15e9f4349d3fe9a5125384d851e4e582
font_01_sfnt_off00005f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7F 19208 bytes
SHA-256: 55bd449ca9c9a3662e942640cef298b304cdbd1e08c88d4e10aed8779b927ced

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