Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08ba717a9df779e…

MALICIOUS

PDF

49.4 KB Created: 2021-05-12 15:40:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b78b8cdc80d512c216ad9b474965d82b SHA-1: f1b5300714a6c16a0657a6af82d89f760c61578f SHA-256: c08ba717a9df779e072b7bc6aa2e41be15b7e7a87eb1649448f6812c9fe51499
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are designed as lures for game hacks and free currency, specifically targeting popular games like Coin Master and Roblox. The heuristic firings confirm that the PDF links to a 'free generator / game hack' redirector, and an ML classifier flagged it as malicious. While no scripts were explicitly extracted, the nature of the lures and the embedded URLs strongly suggest an intent to redirect users to malicious sites that may host further exploits or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9349

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-coin-master-no-verification-game-hack PDF link annotation
    • http://xn--80aciiv6azczc.xn--p1ai/images/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bd9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD9 29500 bytes
SHA-256: 040d01474aded1e74976748ced52a812cbbb37fcd41546e8ba37f2e66b4a308e
font_01_sfnt_off00008b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2B 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00009fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB6 18020 bytes
SHA-256: 77b170e61ca69d8811d571f4609d25c793482ce418daab97f8cf0cf89b73ec51

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