Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3677f53a4c2d65b…

MALICIOUS

PDF

33.1 KB Created: 2021-07-03 14:32:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ff0c392388ff2e4f3d88c770f58a40cd SHA-1: 901cc14338e772f5449748cd78537d56c591ce13 SHA-256: e3677f53a4c2d65b9a5ecf8e069a7b46c619e25db96393ab24250d7530a77956
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'Coin Master' and 'Roblox' related scams. The primary lure appears to be a 'free generator / game hack' for Coin Master, directing users to http://netcdn.tw/app/406889139/coin-master-free-coins-amp-game-hack. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest a phishing or scamming attempt designed to lead users to potentially harmful websites.

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-free-coins-amp-game-hack In PDF document text
    • https://www.e-starmagazine.com/uploads/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/is-a-roblox-account-free_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-palace-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-accounts-on-roblox-that-have-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-hack-thinknoodles-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-master_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_off00002e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E82 21624 bytes
SHA-256: e700a6913dd6d4e13e0cbd5cc133002e2ac563ae9a1101c94d83b184932def90
font_01_sfnt_off00005e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2F 18432 bytes
SHA-256: 115052c54ad7be7ecf7f7200d638d52990c020622732c51f9e53714cbdbedbdf

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