Malicious PDF — malware analysis report

Static analysis result for SHA-256 eccf6a6f934cc4fe…

MALICIOUS

PDF

43.1 KB Created: 2021-05-10 18:00:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a6d63a7329da5fbbeb6b7ba34ea5b117 SHA-1: 3f5d3902b8660592a0d99addb4cc199f5e816025 SHA-256: eccf6a6f934cc4fe9ec3988a7aa5023c09db0450a7b36fad80377662f21cff36
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a primary lure pointing to a game hack website. The heuristic firings indicate that the PDF is designed to redirect users to external malicious content, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, suggesting an intent to exploit user interest in game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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-fan-hack-game-hack PDF link annotation
    • http://moralcenter.or.th/images/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://moralcenter.or.th/images/robux-online_GM431946152.pdfIn PDF document text
    • http://moralcenter.or.th/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://moralcenter.or.th/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://moralcenter.or.th/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://moralcenter.or.th/images/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://moralcenter.or.th/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://moralcenter.or.th/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://moralcenter.or.th/images/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://moralcenter.or.th/images/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://moralcenter.or.th/images/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://moralcenter.or.th/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://moralcenter.or.th/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://moralcenter.or.th/images/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://moralcenter.or.th/images/minecraft-ios-mods_GM479516143.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_off00004146.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4146 24832 bytes
SHA-256: 098267676aa0293430066c725497f3b68773bcb31384178f725b98a7b327903c
font_01_sfnt_off000079ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79CA 4020 bytes
SHA-256: dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5
font_02_sfnt_off00008752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8752 17880 bytes
SHA-256: 9d1f455011f0aa7862855f259ab9ea2efa3be9ec050c3ec97e4c793879e57b5c

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