Malicious PDF — malware analysis report

Static analysis result for SHA-256 829bca092d7bf0a7…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 03:50:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a66939f4403ccaa7fffc89b0a4091165 SHA-1: ab2e07abfd2d063509eb9b1193e6dbe0724caf37 SHA-256: 829bca092d7bf0a7d0b10f92eae6aa4bdbcfbcb96f9ade3d440fd8305b34d88c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'game hack generator'. The document body and extracted URLs suggest a lure for users interested in free in-game currency or cheats, leading them to potentially malicious sites. The ML classifier also strongly indicated maliciousness.

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/how-to-block-someone-on-coin-master-game-hack In PDF document text
    • https://miraller.com/upload/files/is-tiktok-free-app_GM835599320.pdfIn PDF document text
    • https://miraller.com/upload/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/robux-gratis-sin-hacks-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-roblox-accounts-and-passwords-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-blue-adidas-shirt-free_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-flee-the-facility-hack-dlc_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/wurst-client_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-mod-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/hey-google-can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-free-model-virus-script_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/www-roblox-robux_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-free-robux-promo-codes_GM431946152.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_002_off00002f69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F69 23488 bytes
SHA-256: c5d89e6e9057a3b0448a9010572fa4fa13019cc997963395a28f389beb094dd1
font_01_sfnt_off000064a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A8 18716 bytes
SHA-256: dc2aca6796f2c3277543009f3b518ac3286807ed27c41d74326e2a2879575f3b

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