Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a60cbf870e3784d…

MALICIOUS

PDF

42.4 KB Created: 2021-05-10 13:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9ad52681edeeda747a2b544ab55dae1c SHA-1: bee001c614d2850d5a0175c65d058ab279e3cf2c SHA-256: 5a60cbf870e3784dbef51abcb5eb0eb087b164114421a740c7051dc43b4d5817
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, leading to a "Coin Master Hack Tool 2021" lure. The embedded link `https://netcdn.xyz/app/406889139/coin-master-hack-tool-2021-game-hack` is a critical finding. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user interest in game hacks to redirect them to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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-hack-tool-2021-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/www-robux-com_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/robux-in_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-codes_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_off0000459b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x459B 29684 bytes
SHA-256: 4881b57a52f6a7e71288051f6b5fb744e82e8c710d2c0de51c884eeb5b6b9d1a
font_01_sfnt_off000083f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F3 18192 bytes
SHA-256: 811befa785f1ceb1181632f77b53e437429424eef4610f298aaee61bf5104641

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