Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6e4f15ed34224a…

MALICIOUS

PDF

34.2 KB Created: 2021-07-09 19:51:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 85f3f19811a4eb700820cad9701a0ef6 SHA-1: 7199d9f7796eeac138e92e3a089fbf91235d2382 SHA-256: 5b6e4f15ed34224add3b2b3ca83601a9e8e2075e8568db3ea6ace60b18defb05
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and pages offering 'free generators' or 'hacks' for popular games, indicating a phishing or scam lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a malicious workflow designed to trick users into visiting potentially harmful sites.

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/coin-master-free-bonus-game-hack In PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-get-free-unlimited-robux-in-roblox-youtube_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/secret-robux-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox-free-skin_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox-taxi-simulator-give-all-cars-hack_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/robux-earning-websites_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-get-free-spins-for-coin-master_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_off00003204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3204 22060 bytes
SHA-256: 762a95e4033938edf1f03487d77ceb6f7f7f6cc73b43018f2b4fa45eda2fa302
font_01_sfnt_off000062d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D6 18352 bytes
SHA-256: 7b90768ef900af8c4d503bc8b2a117efb516974d9f13f06c1672f765c872eea9

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