Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ba9f9dd7a8c397…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 10:04:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c99a3fe5514e57270b4b558ef1221bdd SHA-1: 9ad0e54c7e1782222e026cd277ead414b7519bd5 SHA-256: c0ba9f9dd7a8c397887bbd7178f899883d95c92001bc25bb0ec82a5b02536e8b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and free spins. The document body and heuristics indicate a lure for users to click these links, likely to download further malware or engage in phishing. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a malicious redirection campaign.

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/406889139/2021-free-spins-coin-master-game-hack In PDF document text
    • https://domc.tw/upload/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://domc.tw/upload/files/roblox-hack-autohotkey-roblox-piano-player_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/free-robux-for-xbox-1_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/fly-hack-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://domc.tw/upload/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/what-is-wurst_GM479516143.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/easy-points-gg_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • https://domc.tw/upload/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/free-spins-on-coin-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_off0000314a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314A 23136 bytes
SHA-256: 852765409947fa124e92c0ceb12176276e4daf1a761abde862dfdb677f33892e
font_01_sfnt_off00006561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6561 18576 bytes
SHA-256: e072abe3ddea7348b6ad42f3e58cf0336d8cc97c01862fb082958ccb0059bec3

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