Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6a406c327e57b1…

MALICIOUS

PDF

45.1 KB Created: 2021-05-13 13:51:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b0fb719778b771080819a4a171248eae SHA-1: c047a1c061ca00c4801200b02fc288881825a551 SHA-256: cb6a406c327e57b1a4d80b080961bc1681a14b6e53625e7a4426b5d8d1461d8b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent lure for a "Coin Master Unlimited Spin And Coin Hack" and embeds external URLs pointing to similar content. The ML classifier flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a malicious site for a scam or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/coin-master-unlimited-spin-and-coin-hack-game-hack In PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/robux-miner_GM431946152.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-today_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_off0000490f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x490F 25608 bytes
SHA-256: 6f73e3aeda3fc2fe313e65c15a3765164f85473b77edb69340d7cfab56fa7ca7
font_01_sfnt_off0000833e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x833E 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF0 18584 bytes
SHA-256: c8e711e41b973747ec323a47a761701fdaf1f8f6730ed7788ccf1517fe3358ad