Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8346c8c6c1f57d4…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 22:24:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 67e4a611281fa5b38b0af7a299758707 SHA-1: a2aa1da47d60d87665c486542752e0e4ba3de481 SHA-256: d8346c8c6c1f57d4efbb8d82f88d5eb3ca6f0bba3d81e69478f330941040ecb6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, specifically advertising free Robux and game hacks. The document body and heuristic firings confirm a lure-based attack pattern designed to trick users into visiting these malicious sites. While no scripts were explicitly extracted, the nature of the embedded URLs and the lure suggests a potential for further malicious activity, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-roblox-promo-codes-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/krnl-download_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-robux-cards-free_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-obby-limited-time-only-games_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-free-animations_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-spins-on-coin-master-android_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_off000030b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B1 22344 bytes
SHA-256: bfca220b03a8f6fbd0b18f5d8d761ff0a7a42b8cb09ac94d6f99952fe3ae3f0b
font_01_sfnt_off00006285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6285 19380 bytes
SHA-256: a452d0c191873ed4d1cd88fa82656ca938fba3e74f496bef56901f9d10460b65

Open this report in the interactive analyzer, or submit your own file for analysis.