Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f8d37bfd8c4da8…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 05:40:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3dc9f2fa8f22a6677c51f201424165d1 SHA-1: 2e0f5316557d57b4ee7e7ee5512f1da901ceb946 SHA-256: b6f8d37bfd8c4da836e42dba972a65abcf4472d4992988d5a173f177b0c05fea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is https://netcdn.xyz/app/406889139/how-to-hack-coin-master-using-es-file-game-hack. The document's structure and embedded links suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-hack-coin-master-using-es-file-game-hack In PDF document text
    • http://tasleemdubai.com/userfiles/files/_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/robux-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b06.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B06 25304 bytes
SHA-256: 35c239e5231ae60ccb654da2f3a88fc9df5b3ca72d718001b88fcdd67f4d46d2
font_01_sfnt_off00008343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8343 18592 bytes
SHA-256: 7b6829f0c912f355393962c39643cd2cadf5d604c17bb92301d7763a729473f1

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