Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd8b02a40c0936e…

MALICIOUS

PDF

28.4 KB Created: 2021-05-10 19:37:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5795583cc28761569662bc66b30f2c68 SHA-1: d788c8444a5795e35642b206d39dd93531ec3819 SHA-256: 8dd8b02a40c0936e9a4e25c5d3b548be21b060eb3414ea1c6addd84086285ac9
82 Risk Score

Malware Insights

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

This PDF document employs a common lure of 'free game hacks' to entice users to click on a malicious URL. The primary URL, https://netcdn.xyz/app/431946152/free-robux-just-click-game-hack, is likely a redirector to a site that will attempt to download further malicious content or conduct phishing. The ML classifier strongly indicated maliciousness, and the presence of external URI heuristics confirms the redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

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/431946152/free-robux-just-click-game-hack PDF link annotation
    • http://smkn1salatiga.sch.id/library/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/master-game_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_off0000221c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x221C 19572 bytes
SHA-256: c08bbbaa7be003e948ed0f5257fd72a2b2927676bc72ed49f5575599b213aba3
font_01_sfnt_off00004b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B42 18648 bytes
SHA-256: e1ded540cd05842e87825decc4eb8ad0d20e53c32addf12c669dcda9e984b3fb

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