Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7e855e9120ee4f…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 15:01:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 86b55f38ba602394142bf34b2e70ad3c SHA-1: 429103f9c1f5d892eeeac6bcdae155b6b65b42f3 SHA-256: db7e855e9120ee4f7a5f11b7306b54958a05cb0cb839b09d29ff5d9b8ee93ba1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'game hacks' and free in-game currency. The document body and embedded links strongly suggest a phishing or scam attempt designed to trick users into visiting these malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/how-to-get-a-free-dominus-in-roblox-game-hack In PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/pubg-uc-top-up-center_GM1330123889.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-rape_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-rules_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.nrzroblox.comIn 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
font_00_sfnt_off00004e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E6B 24564 bytes
SHA-256: 4e88c6067fad0990afe06a24c41c4a2e5d71016d5cb901915659ae355fffa94e
font_01_sfnt_off0000857e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x857E 18904 bytes
SHA-256: 6e08a1d3d8db35cbcf3453bc44fd51b371bae21527e0bfedf630d8e5389ff3c5

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