Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f41379951981ce6…

MALICIOUS

PDF

43.5 KB Created: 2021-05-17 08:36:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 16e229b34b20127ce0266e015c0e5960 SHA-1: 60732618005423863ddb7dec114480cbd8cc8b72 SHA-256: 3f41379951981ce6311a3cdc2e392abccc2532cd6a347359b76a1ec6eb6d8466
102 Risk Score

Malware Insights

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

The document contains a lure for a "Coin Master Hack" and explicitly requests recovery secrets or private keys, indicating a phishing or scam attempt. It also embeds multiple URLs, one of which points to a suspicious executable download. The ML classifier strongly flagged this PDF as malicious, supporting the observed social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-hack-version-ios-game-hack
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spin-27_GM406889139.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/hacks-para-coin-master_GM406889139.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-daily-bonus_GM406889139.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/how-many-levels-does-coin-master-have_GM406889139.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/lazy-blocks-com-free-robux_GM431946152.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-robux-hack-2021_GM431946152.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-robux-by-watching-ads_GM431946152.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/how-to-scam-on-roblox_GM431946152.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-robux-safe_GM431946152.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-robux-website_GM431946152.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/minecraft-hacked-client_GM479516143.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/real-roblox_GM431946152.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-executors-for-roblox_GM431946152.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-robux-promo-codes-2021_GM431946152.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdf
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/minecraft-free-ios_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d77.bin
045e931e59ae3671eb55ea41268c0b0e7685a377c6c8c519e5bad10e27470744		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D77 25816 bytes
font_01_sfnt_off000088d7.bin
849319ab9256530e782e8f71c1ec5ce64162b8af72e859679b1a010bfb2d37d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D7 17848 bytes

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