Malicious PDF — malware analysis report

Static analysis result for SHA-256 b018e9f976fe3197…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 11:55:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3290b0bcd70a4600e2ca27cc548eab36 SHA-1: 25eb4fc3a342a2fc348e378cab4a2295f518100d SHA-256: b018e9f976fe3197a9528ce3218454157bf7c357f6c20e69239349e0412ebd3b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game items and hacks, directing users to malicious websites. The primary malicious URL identified is https://netcdn.online/app/431946152/free-robux-gen-game-hack, which is flagged as a known malicious redirector. The document's content and embedded links suggest an attempt to trick users into visiting these sites, likely for further malware delivery or phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-robux-gen-game-hack In PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-cheap-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/robux-game_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/daily-free-spin-coin-master-link_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_off000050ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50EF 25308 bytes
SHA-256: 5fae304a32d21cd651723ec2c862768ceeae9bdab2872b9add5a16727b11ef95
font_01_sfnt_off00008bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB2 18012 bytes
SHA-256: b822dfaf3b200acc051a64c4c7a9b8bc6e1a7e93aa10f3c17b5d396512734dd6

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