Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64e38610f838fc9…

MALICIOUS

PDF

44.3 KB Created: 2021-05-18 03:19:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c4f7372002054ab0b134acb2fedbe9d4 SHA-1: f8e40cf5857ab810faf11987929b2b5d0dcefbf6 SHA-256: d64e38610f838fc9a48619a7c5831f3a7dfb0a6d96e0198006b27b6bfbfd956b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure associated with game hacks and generators. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the lure of free game items suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/games-like-coin-master-game-hack In PDF document text
    • https://www.fhccu.com/images/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/roblox-verification_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/rbx-roblox_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/free-coin-app_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • https://www.fhccu.com/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/free-robux-websites-2021_GM431946152.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_off000049c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C9 24380 bytes
SHA-256: 42c47101fb3f47e2008c98b103addb4988c88c5c3a0c825a6f163620018e0eca
font_01_sfnt_off000081b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B4 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9F 17976 bytes
SHA-256: 2545fd845a8b9b89b0f46202648a02af0cc4ccf8f9f45e2a3997a5201f678305

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