Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9e8f71c3db7c3b…

MALICIOUS

PDF

33.5 KB Created: 2021-07-09 09:38:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 63688197b64695e06a84219ad4e28562 SHA-1: f78cab4ae857e275c62ff1c500408229bd1dc6c6 SHA-256: 3d9e8f71c3db7c3ba54bf288b7e2e422d92e53c93600253de1bcaf14800019f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a 'Coin Master Hack Generator'. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt.

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-hack-generator-tool-game-hack In PDF document text
    • https://3qblocks.com.tw/image/data/files/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/hack-to-get-money-in-gta-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/hack-denisdaily-on-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/hack-de-anonymous-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-robux-hacks-2021-working-no-scam_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-hacked-shirt-id_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/island-royale-hack-roblox_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
font_00_sfnt_off00002ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE8 22408 bytes
SHA-256: a3cbcaaca2490b41f5ac9c6bbabe27363861a18febd4bd7b7f35fac88de0192e
font_01_sfnt_off000060c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C8 18080 bytes
SHA-256: 327a07673a8d53801420e060aff8c245633122f699ccd3ede14de91ca17eb61d

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