Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa2f91cc144d3e9…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 05:43:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eca6853376f22a0ca1eb040397a656bb SHA-1: bcbda2b6b3603df97c8fbfc74d4f171febf38744 SHA-256: daa2f91cc144d3e9b9f655c2b49a3463c1e03eb2ee9df11ec85b1abce781dbe7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics suggest a lure for 'game hacks' or 'free generators', aiming to trick users into downloading further malicious content. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/how-to-hack-coin-master-game-hack In PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/generator-robux_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/earn-roblox_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://seltechutamamandiri.com/ckfinder/userfiles/files/coin-master-hack-blog_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
stream_004_off000051d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51D6 24628 bytes
SHA-256: a8e72d498abc63234baffb02d6b57159f2cc5deef32b8e906782db4549ff3875
font_01_sfnt_off000089cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CC 17880 bytes
SHA-256: 811ddb8557bc0f5be85009fa6d5ae0baa2b7fc09c58d91c5790597872cecd122

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