Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd1438de2beee83…

MALICIOUS

PDF

34.1 KB Created: 2021-07-07 01:23:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 96d57a2d89d523bc41a0535aad5bc408 SHA-1: 911f3d69d737a5e65fbb4bb2e17864fa2d5a72ca SHA-256: 4cd1438de2beee8307ee2461d3c07703a4994c123f6a4b85c828cad64914d356
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirector infrastructure, specifically targeting users interested in game hacks and free currency for games like Roblox and Coin Master. The document body and embedded URLs strongly suggest a social engineering lure designed to drive traffic to potentially malicious sites. No scripts were extracted, but the presence of redirector links and the ML classifier's high confidence indicate a malicious intent to exploit user interest for potentially harmful purposes.

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/roblox-army-free-robux-game-hack In PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/hack-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/pubg-uc-ykleme-hile_GM1330123889.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/1b-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://elearning-mtsn3ppu.azzahra1.xyz/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.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_off00002f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0E 22072 bytes
SHA-256: 6897e87deb88a48029da35e6ad330ed052bdd3a733bfcff122fb5f3b79f321d7
font_01_sfnt_off00005fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBA 19228 bytes
SHA-256: 5339edd26a46d5c8fe04f627c79d78710f89e028f0bde03da11f3fdfc149047d

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