Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a7a83cb4151e7ec…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 19:36:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c7c0588810d6f43d2a050aa9cce8a448 SHA-1: 6ab07dfff23446e575892bf7a837c4eda14afd88 SHA-256: 3a7a83cb4151e7ec8648f49b46af05022b68ef65d3cd2ec666d78db72a05f225
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that point to known malicious redirectors and lures users with promises of game hacks and free items. The document body and heuristics indicate a clear intent to drive traffic to these malicious URLs, likely for phishing or further malware delivery. No scripts were extracted, but the presence of numerous malicious links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/how-to-hack-coin-master-root-game-hack In PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsdditakkalasi.com/__statics/gudangsoal/files/coin-master-free-download-pc_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_004_off00004eea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EEA 25816 bytes
SHA-256: 1b507eaee74b5b168ec5391fb6afb5bb8492a83a47523e3f85ead082c032886b
font_01_sfnt_off00008997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8997 17880 bytes
SHA-256: 8d1f2374cc0ee299ef3230cc600176bd8051b87b632aac22800208bfbee90f8f

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