Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ba8f8e54a47751…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 09:30:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 21a9c7a87e4a755cbc7349e720cbc39a SHA-1: daabdbcd3a2e475dd7869c27391bb7d08fedb659 SHA-256: c4ba8f8e54a47751d618b9c435cda4c077da189b5c9d19b2b522531881c08e22
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple lures related to game hacks and free currency, directing users to external URLs. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous game-related URLs strongly indicate a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://netcdn.tw/app/406889139/get-free-spins-on-coin-master-game-hack PDF link annotation
    • http://36.94.36.7/elib//repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfPDF link annotation
    • http://36.94.36.7/elib/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/cheating-on-broken-bones-roblox_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/roblox-hack-download-no-virus_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/robux-claimer_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
font_00_sfnt_off00003040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3040 22248 bytes
SHA-256: 5a611d696d1c8254f3d2fff54b8c3c8613a73daf8663211c512ca19f60100437
font_01_sfnt_off000061bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BB 18176 bytes
SHA-256: c16df4cb6866c2276686c5aaa4a0cb78e61d49506a44cfdb7663fe8f5aebf96b

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