Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6a7c10e0f5f915…

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 05:30:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ae574a799efb638dc991a3402720e29f SHA-1: 7c91922dbc718ba0a6ba58593bd5249a450620fb SHA-256: ab6a7c10e0f5f9152591dfeee81cc240238c05b26f365b8bfbdbc2a70599a69e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains links to known malicious redirector infrastructure, specifically advertising "free generators" and "game hacks" for popular games. The primary lure URL is https://netcdn.online/app/406889139/coin-master-free-spins-apk-game-hack, which is part of a network of domains hosting similar lures. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving traffic to potentially malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/406889139/coin-master-free-spins-apk-game-hack In PDF document text
    • http://thamelinn.com/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-sued_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/minecraft-xbox-free_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/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005089.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5089 26924 bytes
SHA-256: aba0f1f4bfc706a054a3b53ffd0d42b6b4e8b19e1d93b641ddab24874b4c968d
font_01_sfnt_off00008e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E56 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9807 18056 bytes
SHA-256: 4a0975cb4ff59b90613a77ae23c76f45b98fe93665a9537e2ed5b6c7d8755f19

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