Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c5ad4afed1d76a…

MALICIOUS

PDF

45.9 KB Created: 2021-05-17 07:44:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 20692aef8280891969dd2d474d1a4518 SHA-1: 0b5bff6dc5c8fb59531f0f45c9c53188ee506b89 SHA-256: b5c5ad4afed1d76a2f1ff721523e0e921429c811f1140394e44f6bb3dee39f81
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or free spin generators. The heuristic firings confirm these links point to known malicious redirectors and a lure for game cheats. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggests an attempt to drive users to malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9503

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-free-spins-blogspot-game-hack In PDF document text
    • https://lita-lb.org/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • https://lita-lb.org/images/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • https://lita-lb.org/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/how-to-get-free-robux-not-a-scam_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_off0000496f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496F 27956 bytes
SHA-256: 3231be7918dbbfc683044ea56838dd5e311cad453562e93e6e11aa972aec7635
font_01_sfnt_off00008693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8693 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9045 18464 bytes
SHA-256: 7f13c81e41627db5de1fdc011b77043c9877b216986226f08b9acd2eded814ce

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