Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3eaa3cd3768736…

MALICIOUS

PDF

44.8 KB Created: 2021-05-15 17:06:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7cf3d15668ccfa56e1dbb5dfd6917276 SHA-1: e22f15d28ba6dfd2e040a2caf5eee04aef973519 SHA-256: 5c3eaa3cd37687362ce6e1ef464561a1a2949fb152c20f4460ed3290ddc880b4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The document body, though partially corrupted, contains a URL that aligns with the heuristic findings. The presence of these links suggests an attempt to trick users into visiting malicious sites, likely for further exploitation or credential harvesting.

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 https://netcdn.xyz/app/431946152/how-to-hack-roblox-on-mobile-game-hack In PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-daily-2021_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
stream_003_off00004bc3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC3 28048 bytes
SHA-256: 1ca3d043052b822ab5c5727e73378649b7d8a94f491ff0a86881d8a8d4260644
font_01_sfnt_off00008bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC2 18660 bytes
SHA-256: cfa1ee913d083643ff52c211c3740090c9e62a3c87f75aa46b5fb7e4e02a93ce

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