Malicious PDF — malware analysis report

Static analysis result for SHA-256 39510c8dd2f71fb2…

MALICIOUS

PDF

41.5 KB Created: 2021-05-14 02:08:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 81449a6c03f3e691ff017fdc4ee4a324 SHA-1: 14d404e28a5df2b8d71edf358e155f3589fee67f SHA-256: 39510c8dd2f71fb2fe48115d45c4dce33c3f2ef409c78052512a7a3effe36621
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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.xyz/app/406889139/coin-master-hack-online-link-game-hack PDF link annotation
    • http://inextpresident.com/images/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/get-free-robux-today_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_off00004970.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4970 24956 bytes
SHA-256: cc2befe3e2bd0bfd691309f0af0b080352bf1a07c30d4f25af0a24640caa5a24
font_01_sfnt_off0000816b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816B 17788 bytes
SHA-256: fe6378a35aaddd1df9c91bfaa88201bdad89d62d9f4d299995ec0f595f057003

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