Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e73a83f6488a0e2…

MALICIOUS

PDF

41.5 KB Created: 2021-05-11 23:00:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c6b53b80230bf47375ba9b8aa46c456e SHA-1: 5645fad3b551dff38b10efc28ca0ce8ab57a4641 SHA-256: 4e73a83f6488a0e28c3fba4294b3063019b6e1e00bc3dbf1e5acf5ccc01d052a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to websites offering game hacks and free currency for popular games like Coin Master and Roblox. The presence of these lures, combined with the ML classifier flagging it as malicious, strongly suggests a phishing or malware distribution attempt. The document's primary function appears to be directing users to potentially malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/free-coins-coin-master-iphone-game-hack PDF link annotation
    • http://183.91.70.7//repository/hack-robux_GM431946152.pdfPDF link annotation
    • http://183.91.70.7//repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/robux-best_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://183.91.70.7/repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/rbxoffer-com-free-robux_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_off000048a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A2 24368 bytes
SHA-256: b8dd3b6e77d930fcc5d58ded2db7ff3330572dde6580c587dccae8133519b6dc
font_01_sfnt_off00008086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8086 18052 bytes
SHA-256: 99dbb6b6b1c2666a4e7c95b3e8e09f0f63bf7a1f88354efaa1e52c2fabb98515

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