Malicious PDF — malware analysis report

Static analysis result for SHA-256 6542237131ff7208…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 06:32:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c1c9ee5683eee539f7d8da4b397b3187 SHA-1: b404d8de8fb78b527c4ad9f9f6b6d6040f743356 SHA-256: 6542237131ff7208ee07a99a10e6d00260c7a7c9d3112ee2cda0b04bd0704c0c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a generator or hack for popular games. These links redirect to malicious infrastructure, specifically the URL https://netcdn.online/app/406889139/20-free-spin-link-coin-master-game-hack, which is flagged as a known malicious redirector. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/406889139/20-free-spin-link-coin-master-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-minecraft-realms-for-free_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_off000051ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51EF 24220 bytes
SHA-256: 74ff7c9e6fb79b767a8cb0736b5b47e2bcc3c43d09f39931a1e61c1fb5f5d0b3
font_01_sfnt_off000088e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E7 3560 bytes
SHA-256: 9d03f7c6c62ba3e7fdc0441e9d982a863b2b60b781165d6920512f68ecc4a440
font_02_sfnt_off0000956e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x956E 18352 bytes
SHA-256: 4dd766e4f27b72d6e8e66c439aca94e2b7f3531775cf9d126f518490910b573e

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