Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec8dfe4bcd3c93b…

MALICIOUS

PDF

42.5 KB Created: 2021-05-11 22:32:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a7c67db8816b72f01e323f25218d1e73 SHA-1: af166a50fc5fe9b7a6e00a7a3d58b7b1e13f7647 SHA-256: 3ec8dfe4bcd3c93b2ed7bbfaea91f4e2a5279ef389aae7ba3fe2878267c787c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to known malicious redirector infrastructure, specifically promoting game hacks and free currency generators. The document body and heuristics indicate a lure for users interested in games like Coin Master, directing them to the URL https://netcdn.xyz/app/406889139/coin-master-free-coins-link-2021-today-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-coins-link-2021-today-game-hack In PDF document text
    • http://arpinoturismo.it/images/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/easy-robux-today_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-get-free-minecraft-coins_GM479516143.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_off00004937.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4937 25124 bytes
SHA-256: 8f1565703a821bbb8347bb44fc8a85c743fdadf25529902fc18b3360c16d0a0e
font_01_sfnt_off0000829d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829D 18636 bytes
SHA-256: 54ee628be55815102d4fd2b2c16d0cf2d83f73b68c782c007c481b291bfa8535

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