Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec42f2ebccd54bf6…

MALICIOUS

PDF

43.8 KB Created: 2021-05-13 08:00:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 81bf4d4c2d6cf4bca668448cea0aa3ba SHA-1: f48fa10c27267adcce20b41b6806e1eb33568a6e SHA-256: ec42f2ebccd54bf613e9deeec30526d497b5cdc719fb815692d81399919ec6a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting "game hacks" and "free generators". The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-game-hack-version-download-game-hack. While no scripts were directly extracted, the PDF structure and embedded links strongly indicate a phishing or malware distribution attempt, likely leveraging a social engineering lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/406889139/coin-master-game-hack-version-download-game-hack In PDF document text
    • http://iedarelief.us/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/wurst_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/free-robux-no-human-verification-2021_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_003_off00004b54.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B54 26068 bytes
SHA-256: 0f41bfdb1d38c571b8b9529ef9c47a26ddafa266bc231a1f4c24fd98bd9aff45
font_01_sfnt_off000087c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C0 18692 bytes
SHA-256: bf7747fad6589835e27396875397848ee10c05064cdddbf89c0c768158d1b55c

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