Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87bbc6dd969eab9…

MALICIOUS

PDF

46.2 KB Created: 2021-06-03 08:26:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 538d0fab9986e1d34d70ce646cb32431 SHA-1: 6bce389ef1b7172187c5377160c221b672a5e7f2 SHA-256: d87bbc6dd969eab901969447e7008996ceea9e72199ae3be482b21c61bec34ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a primary link to 'netcdn.online' which is flagged as a malicious redirector. The document body and heuristics indicate a lure for 'game hacks' or 'free generators', suggesting a social engineering tactic to trick users into downloading further malicious content. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/406889139/coin-master-hack-app-game-hack In PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/robux-hack_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/minecraft-xbox-360-free-download-code_GM479516143.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_off0000518b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518B 24324 bytes
SHA-256: a2b7277a52cf420c32f533788260d8aedbb5ee480c6e55500a605c6e2ddedbd9
font_01_sfnt_off00008902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8902 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000092ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92ED 17892 bytes
SHA-256: f939fda97690d6a809d743b342add8ec97984f5e978608423f32dd39679c4d64