Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48d93c8312e43fc…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 08:11:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dd1a8cbc3e97c57da94eb76f94b23757 SHA-1: 2bd65f9aa661b79f6e503d57452148a8554cd31b SHA-256: c48d93c8312e43fc172cfac8fdff66d1b340249c6091266794741824b2c1cdcc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'free script executors' for games like Roblox. The document body and embedded URLs strongly suggest a lure to a site that likely hosts malware or further phishing content. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a malicious redirection workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/free-script-executor-roblox-game-hack In PDF document text
    • https://razredna-nastava.net/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f84.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F84 28672 bytes
SHA-256: d5e0f0053b32e1ba7c6feb8d65e0a9cdc58fd344091f6175da976b0f8f1f2c6a
font_01_sfnt_off00008f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F50 3096 bytes
SHA-256: d05729863dc05721ada29044278030255eeda038236568e8246a87d3a8573d6e
font_02_sfnt_off000099fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99FC 18488 bytes
SHA-256: c1d8906df7cfed201442eecb2c05ff4a638972dd76746327367067a9273c3e32

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