Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c71dfce86617812…

MALICIOUS

PDF

43.2 KB Created: 2021-05-18 04:01:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: af6903261726ff3d85fa7fbf9e5baf66 SHA-1: ed25ae741a6419be59aecaac677018993bf84bb4 SHA-256: 3c71dfce86617812d6469bdbfdbb0b6ff6fdb19f4ff5e6fa3126a41dab9433cb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic indicating it links to a game hack lure. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-daily-spin-link-app-game-hack, is likely used to redirect users to a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into visiting a potentially harmful resource, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-daily-spin-link-app-game-hack PDF link annotation
    • http://nicoletastancu.ro/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://nicoletastancu.ro/images/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://nicoletastancu.ro/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://nicoletastancu.ro/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://nicoletastancu.ro/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://nicoletastancu.ro/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://nicoletastancu.ro/images/free-robux-script_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_off0000495a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x495A 26420 bytes
SHA-256: 2a83525fe15e4b75ee9a8595f16efd98977f82babdc18475f229c5c0618a7559
font_01_sfnt_off0000866f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866F 18316 bytes
SHA-256: 1c8f52e50ef16cca0df83ed02daf45b2dac44b7d574d319931a9576780881370

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