Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3d7a517a7fdb6c…

MALICIOUS

PDF

45.6 KB Created: 2021-05-12 13:19:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5f5dc8015bb341f3d783555d2f218729 SHA-1: 0daac3200781e693c5bda2fcd8608042a90d64b1 SHA-256: 2b3d7a517a7fdb6cbbdd3c0541776019d5f0bc0c2f8a531726330b04e7287180
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links and a visual download button, directing users to external sites that host potentially malicious applications. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL pointing to known malicious infrastructure, indicating a clear intent to trick users into downloading unwanted software. The ML classifier also strongly supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 3

  • 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-3.2-mod-hack-apk-download-game-hack In PDF document text
    • https://roberto-gac.com/images/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • https://roberto-gac.com/images/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • https://roberto-gac.com/images/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • https://roberto-gac.com/images/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://roberto-gac.com/images/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://roberto-gac.com/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://roberto-gac.com/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://roberto-gac.com/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://roberto-gac.com/images/robux-free-online_GM431946152.pdfIn PDF document text
    • https://roberto-gac.com/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://roberto-gac.com/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://roberto-gac.com/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://roberto-gac.com/images/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • https://roberto-gac.com/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://roberto-gac.com/images/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • https://roberto-gac.com/images/robux-without-verification_GM431946152.pdfIn PDF document text
    • https://roberto-gac.com/images/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • https://roberto-gac.com/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://roberto-gac.com/images/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • https://roberto-gac.com/images/promo-codes-to-get-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_003_off00004bac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BAC 24676 bytes
SHA-256: f2d121d8fba18dec5996823f4053a785d5d1158d7221195e3e32cdb940fdb3cf
font_01_sfnt_off00008401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8401 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEB 18836 bytes
SHA-256: ff135a53a420a418677011958d681f26302d42eb767583c3b8513888fb402d9d

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