Malicious PDF — malware analysis report

Static analysis result for SHA-256 5870b312b4f9ebad…

MALICIOUS

PDF

50.5 KB Created: 2021-06-03 14:04:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2a81b00f5d1bb13a7e3de3c846f53f89 SHA-1: 409969124a3e06134feb4a35b6e2c16bf500c455 SHA-256: 5870b312b4f9ebada0c6a28a9873a716fdd005c686bbcc83dbac2d42ab7b3fb9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, disguised as a 'free generator' or 'game hack'. The heuristic firings indicate the PDF is designed to lure users to this malicious infrastructure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

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/406889139/100-free-spins-coin-master-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/wurst-minecraft_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-free-item-id_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/pokemon-go-free-coins-hack_GM1094591345.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/pokemon-go-free-619_GM1094591345.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e41.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E41 24748 bytes
SHA-256: 2fdb318d7ec70f3659b3943c10d37735e279811839ab765177203b4b9fb18025
font_01_sfnt_off00008701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8701 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000090e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90E7 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_03_sfnt_off0000a2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2FF 18164 bytes
SHA-256: 9bc61af2acbda784231945e40c4a4bb5d6810b0d04641be6b37b2cdd3c5b78bc

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