Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef78291f7dbccee…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 06:17:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9a7fc11b410c40aa7aea4fa55e84bf32 SHA-1: 6c6a76250e5b21af6d421abe7fefd7556ad30fa2 SHA-256: 1ef78291f7dbcceeac40b18d8ae5b3b75fea0125c3ec2ef352709281ce6a1248
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that lure users with promises of free game items, specifically mentioning 'free spins for coin master'. The primary link identified, 'https://netcdn.online/app/406889139/free-spins-for-coin-master-that-work-game-hack', is flagged as a malicious redirector. This suggests the document's purpose is to direct users to potentially harmful content or further malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/free-spins-for-coin-master-that-work-game-hack In PDF document text
    • https://www.metal.hr/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://www.metal.hr/files/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.metal.hr/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • https://www.metal.hr/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/robuxmatch-com-free-robux_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_004_off00004f12.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F12 24900 bytes
SHA-256: b3da60a397bfc9d057183c8583362b55c776fe5b2b3dfaac8b9f44fadbd5bf18
font_01_sfnt_off000087d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D4 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00009c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C5F 18420 bytes
SHA-256: 38941df2f255dbbeb7e8f4cd39caefbe857da85da1c5ae5f328b1c0cb4bd120e

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