Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8ca68ecbd42fa3…

MALICIOUS

PDF

40.9 KB Created: 2021-05-11 23:53:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 18628db1007b4d74e350d2bb2f35d939 SHA-1: 9de104320552d470f684d5a62a84cd9d737f0fcf SHA-256: dd8ca68ecbd42fa34d75f4158b7334cb426799cac70fb1153ee4da0e636e5721
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks to entice users to click on embedded links. The primary link directs to a URL associated with game hacking tools, which is a common pretext for distributing malware. While no scripts were directly extracted, the PDF structure and embedded links suggest a malicious workflow, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/406889139/hack-coin-master-android-2021-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-generator-com_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/get-free-robux-today_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_003_off00004633.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4633 24152 bytes
SHA-256: 7040a8cf7eeb9371571e2ba577d17925a9ee023b070974f9d3f44af246dd2906
font_01_sfnt_off00007d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1B 18292 bytes
SHA-256: 9fbd886436b25eb03f566a14fe39b1cb78edee0ed910026e951b6e8040220874

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