Malicious PDF — malware analysis report

Static analysis result for SHA-256 60cafd92b751fc45…

MALICIOUS

PDF

35.5 KB Created: 2021-07-09 16:50:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 44eae0d497f0f8fb3013bc39678d760e SHA-1: 0fb2c8f9aca0735ddedd27d7989b1faea9a1299d SHA-256: 60cafd92b751fc4579497c029afaaceb7e361bf480a9de9201156d96dcabd542
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/coin-master-hack-software-download-game-hack. The document body and heuristics indicate a lure for game hacks and cheats, suggesting a phishing or scam attempt. The presence of embedded URLs and the nature of the lures point towards a social engineering attack designed to lead users to potentially malicious content or downloads.

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-software-download-game-hack In PDF document text
    • http://thamelinn.com/userfiles/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/admin-script-hack-roblox_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-hack-someones-account-on-roblox-2021-february_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-free-robux-every-5-seconds_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-script-injector-roblox_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/account-stealing-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/robux-life-hack_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/robux-codes-generator-no-human-verification_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_002_off000032b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B0 23272 bytes
SHA-256: 6ae11185f459769718ff18e0a3c1aa65f02cf87c54bdce0a5fc002235df98b92
font_01_sfnt_off00006738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6738 18584 bytes
SHA-256: 5b87fe55fd4b38a4ab20f26a785d2e00240e95c308f97e50c88996560457fccb

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