Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf032d071de9fd1c…

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 15:14:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 62ec9ef1d6d9ddcf3a6e4a5b503f9d71 SHA-1: e8915e3e1b6e838e69c74322433101a6a81f1e07 SHA-256: cf032d071de9fd1c2bbdd1c6d8183795b68fce4c9e2ec3dda8307f3031163172
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' for popular games. The primary lure URL is https://netcdn.tw/app/431946152/how-to-get-roblox-for-free-on-pc-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-get-roblox-for-free-on-pc-game-hack In PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/does-roblox-give-free-robux_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/free-military-shirt-template-for-roblox_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/contrasea-de-roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/roblox-bee-swarm-hack_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/step-3-enjoy-your-free-robux_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/roblox-bloxburg-free-100k_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/pastebin-roblox-items-free_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/how-to-hack-songs-in-roblox_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/free-robux-gift-card-20210-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/roblox-wikipedia-free-encyclopedia_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/works-how-to-get-free-robux-2021-fast-amp_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/hack-meep-city-roblox_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/how-to-use-cheat-engine-roblox-2021_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/how-to-roblox-script-hack_GM431946152.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_004_off00005239.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5239 27316 bytes
SHA-256: 7ca75f74637d87175d9c8d340031e0cacb2be1c6a09c7ca4aa5cd3f7cb92aa7a
font_01_sfnt_off00008faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAA 18372 bytes
SHA-256: dbc9bdc8b330f284d7b4a79ab12523a8931812aafc4a5e632a9b5c9f8e2ae9df

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