Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7588cfc3b18466…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 02:24:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cc6168f759884eee2bc923e003626f06 SHA-1: 64bca9ab67e055e470c046a6169e0f20ef8df524 SHA-256: 1f7588cfc3b184667fde9844895531f2220a6ddced151f2c331f651dbf3ac6aa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free currency, presenting a fake download button to entice users. It redirects to malicious infrastructure, specifically a URL associated with 'roblox-hack-robux-download-apk-game-hack', indicating a likely attempt to deliver a second-stage payload. The ML classifier strongly flagged this PDF as malicious.

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/roblox-hack-robux-download-apk-game-hack In PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/script-hack-roblox-download_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/what-to-do-if-your-roblox-account-gets-hacked_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-script-executor-roblox-2021-no-virus-free_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-things-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/your-free-trial-of-living-has-expired-roblox-meme_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-hack-someone-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/get-your-game-popular-roblox-hack_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-robux-hack-without-downloading_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-free-robux-inspect-element-no-wait-2021_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-2021-without-human-verification_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/roblox-multi-hack-2021_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/10-tips-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-followers_GM835599320.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_off000052cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52CF 25332 bytes
SHA-256: 8d8794417ec2a26cbe2e53914dfa6238c28a2e98d87b12ad9cdc9becb1ac080b
font_01_sfnt_off00008d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4D 19004 bytes
SHA-256: a659d11455a4bf80fd3decb18995190c9b7867f1bca2ea81946d7ba1c3e0f694

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