Malicious PDF — malware analysis report

Static analysis result for SHA-256 efdf9e382ab2e506…

MALICIOUS

PDF

44.3 KB Created: 2021-05-16 16:12:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 416784b23e344e6600726156b86a854f SHA-1: 30d1de7a2e056f83e4c54edfa68ee2d231677b20 SHA-256: efdf9e382ab2e5063c508e96072ac4666f3edcb054401532e4a5aed0470a8ef7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'hacks' for popular games. The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-free-spin-and-coin-link-haktuts-hacking-news-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-free-spin-and-coin-link-haktuts-hacking-news-game-hack In PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004db0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DB0 25208 bytes
SHA-256: 95059798619ad7d7c6bf2c796f8eb1ac517b4ca972f511da3ea04c1b048fb29c
font_01_sfnt_off00008738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8738 19524 bytes
SHA-256: 084204b56ff6c858b97f54f8125aea1e065361cf8985a6d2e2e6efabc221b12d

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