Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8147b4e83d7d85d…

MALICIOUS

PDF

43.9 KB Created: 2021-05-15 03:36:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ba851ff5c2884fb7f4c1115001d5e9f9 SHA-1: dc773fd3965a7cbe5a07ab25fc16d6265aa6f402 SHA-256: c8147b4e83d7d85dc593a309845c37e25f347a10e431638f74a4de4fc48a93f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free Robux'. The primary malicious URL identified is https://netcdn.xyz/app/431946152/get-robux-com-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/get-robux-com-game-hack In PDF document text
    • https://www.mb-alati.hr/files/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.mb-alati.hr/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • https://www.mb-alati.hr/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • https://www.mb-alati.hr/files/hack-master-coin_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/level-coin_GM406889139.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_off00004a86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A86 27280 bytes
SHA-256: db8733fbd5a2fcc6c417af8580a4e1be37d8e9a90c0bac9e37c7a57c51cc907b
font_01_sfnt_off00008958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8958 18216 bytes
SHA-256: e46bf0cf057cdcc1f24e49826db2f5998f04ba9e64eff7e45517ce854ffbd61c

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