Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0bb69408dbf5f08…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 13:31:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 586461e585be87feaf57ff81fe6c0dbf SHA-1: 89a943e0104922db5437f0b9470eef3c3acfa03d SHA-256: f0bb69408dbf5f080c7200b94585f75263188d07b41b851bf9828d5e84ebca9d
160 Risk Score

Malware Insights

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

The PDF contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/406889139/hack-coin-master-pc-game-hack, which is presented as a "free generator / game hack". This lure, combined with the ML classifier's high confidence, indicates a malicious intent to redirect users to potentially harmful content or malware downloads. The document's structure and embedded links suggest it is part of a phishing or social engineering campaign.

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/406889139/hack-coin-master-pc-game-hack In PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-spam-sentenace_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-750-000-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/coin-master-daily_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/roblox-hacked-exe-iso-tar-rar-zip-apk-intitle-indexof_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/flee-the-facility-roblox-hack-exploit_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/vheachle-simulator-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-non-model-roblox_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/pubg-uc-price-in-bd_GM1330123889.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_off00003348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3348 22872 bytes
SHA-256: 631539e48ddd6ff7304b63f01febe13c1d3a070fc3d99f59047968fb5b6c83a6
font_01_sfnt_off0000668b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668B 18160 bytes
SHA-256: 3e4b3e92952dc001d4551139957d58e88d13147b7680b423ad48199b99fc5851

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