Malicious PDF — malware analysis report

Static analysis result for SHA-256 80aefc53a4bfb56f…

MALICIOUS

PDF

45.0 KB Created: 2021-06-11 10:11:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 54c2a3ed21453f9170a165875bc1bea9 SHA-1: 4dce2de430c2de8e8ce9cbc0a26d59a1803f4c81 SHA-256: 80aefc53a4bfb56f53b681544f51f4a685045b33adffce1718c71fce53726265
122 Risk Score

Malware Insights

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

The PDF file contains a lure impersonating Amazon, directing users to a link that promises game hacks. This is a common tactic for credential phishing or distributing malicious payloads. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content, aligning with spearphishing and client execution techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/does-roblox-have-an-anti-cheat-game-hack.
  • 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.tw/app/431946152/does-roblox-have-an-anti-cheat-game-hack PDF link annotation
    • https://www.tiancom.com.tw/upload/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-spin_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/cuantas-hackeadas-de-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/tiktok-free-10-followers_GM835599320.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/blox-fun-info-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-pink-free-robux_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_004_off0000503d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x503D 26168 bytes
SHA-256: 04638f7913843074fb177326182c6f392d5ec061026f8735b82eecd44523e4da
font_01_sfnt_off00008c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2D 18684 bytes
SHA-256: 69decc8d8a490311a9262c8735914a28c2d909173d975e586c21a6b3412e7be9

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