Malicious PDF — malware analysis report

Static analysis result for SHA-256 848cc033c4748ae2…

MALICIOUS

PDF

47.1 KB Created: 2021-05-13 08:33:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d7167b5867b1fd612ecaa0c123d1a2b6 SHA-1: af5ec8e432b1a315e94166237fe904b31c8d2623 SHA-256: 848cc033c4748ae21c0e85f05d45e97edf2c268fd9b507cd535b1474be997d24
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically targeting users interested in game hacks and free currency. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a 'free generator / game hack' for Coin Master, directing users to the URL https://netcdn.xyz/app/406889139/instant-free-spins-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/instant-free-spins-coin-master-game-hack In PDF document text
    • http://micromegamondo.com/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://micromegamondo.com/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://micromegamondo.com/images/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://micromegamondo.com/images/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://micromegamondo.com/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://micromegamondo.com/images/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://micromegamondo.com/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://micromegamondo.com/images/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://micromegamondo.com/images/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://micromegamondo.com/images/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://micromegamondo.com/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://micromegamondo.com/images/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://micromegamondo.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://micromegamondo.com/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://micromegamondo.com/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://micromegamondo.com/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://micromegamondo.com/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://micromegamondo.com/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://micromegamondo.com/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://micromegamondo.com/images/coin-master-hack-tool-2021_GM406889139.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_003_off00004c01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C01 23928 bytes
SHA-256: ce53f87b70e7a0d600557bf3492da67afbb54a782ae5c89cdf7a13ad8063f6e8
font_01_sfnt_off00008282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8282 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off0000970d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x970D 17884 bytes
SHA-256: 548329156333db4fa61a63bcdda2f5f8d49c53e924025ea46218be7e94f839d9