Malicious PDF — malware analysis report

Static analysis result for SHA-256 588146910e1de2db…

MALICIOUS

PDF

45.1 KB Created: 2021-05-18 03:11:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ebf59a84ca4189a990e8890a54cbc0cf SHA-1: 5a4cd074c3fb06ac4456c5de1c5639c02a2acad8 SHA-256: 588146910e1de2db4ea43c28da922c989d73b6b4c3caef5a58b7919f0286bef5
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.003 Windows Command Shell

This PDF document employs a game hack lure to entice users to click on a malicious URL. The document also instructs the user to copy and paste content into a command-line interface, a common tactic to download and execute a second-stage payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/479516143/free-minecraft-texture-packs-java-game-hack PDF link annotation
    • http://guimaq.com.br/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/robux-only_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-unlimited-spin-and-coin-hack_GM406889139.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_off00004a13.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A13 24972 bytes
SHA-256: 55429ca7fb8ed0221690420d388aabfb022efc0ade292350fc5f326a7f2189c2
font_01_sfnt_off00008366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8366 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00008d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4F 18520 bytes
SHA-256: 686fb3e1785c5679fc7febae081669fb57112988378368078b360718af0d5a6a

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