Malicious PDF — malware analysis report

Static analysis result for SHA-256 684824ef7b3a05ac…

MALICIOUS

PDF

42.3 KB Created: 2021-05-10 20:00:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 88e05818ba3863d67f128c580068a292 SHA-1: fcebc41a77ed47965dc4774ba138f82a823a5153 SHA-256: 684824ef7b3a05ac19464a97614760641d89a9fb13f4f1974bcb64f191fedcd8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to websites offering game hacks and free currency, a common lure for malicious downloads or phishing. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the embedded URLs are the primary indicators of compromise, suggesting the document's purpose is to drive traffic to potentially harmful sites.

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/free-spins-and-coins-coin-master-2021-game-hack PDF link annotation
    • http://greasley.website/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-app_GM406889139.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_off00004a42.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A42 25124 bytes
SHA-256: 4e06b2faf1c8be2edb733b2a24bf62dafdbb9534d6df033ca20c3b798e012ebb
font_01_sfnt_off00008245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8245 18460 bytes
SHA-256: 9f443343d33dd80abfdfffa9dfb60a36fd2beaa647f06f075f3e145f27f8847c