Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b9daebe7b78c5e…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 18:04:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c1de580c32437d8b15aa242350fc7159 SHA-1: 7ad9788c855f16f31cdb3b7cf591a36f3c76d211 SHA-256: d8b9daebe7b78c5ebc0e515eec6d448441eadf6a662d17913608567a35984fea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks. The embedded URLs, such as http://netcdn.co/app/431946152/cheat-codes-in-endless-treasure-quest-on-roblox-game-hack, are designed to lead users to potentially harmful content. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to deceive users.

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 http://netcdn.co/app/431946152/cheat-codes-in-endless-treasure-quest-on-roblox-game-hack In PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/como-tener-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/how-to-hack-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/pastebin-free-robux-by-agarminer_GM431946152.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/code-to-put-into-console-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/hack-para-unique-case-clicker-giveaway-at-600-likes-roblox_GM431946152.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/robux-hack-human-verification_GM431946152.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/how-to-get-free-robux-for-pc-2021_GM431946152.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/mad-city-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/free-robux-today-2021_GM431946152.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alajwakh.com/uploaded_files/userfiles/files/free-robux-websites-no-human-verification_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
font_00_sfnt_off0000307b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307B 22888 bytes
SHA-256: 3fedf864346f48619e9e834a833fc6221f5dcf2cdd0c945f65cbacc25bdf50a9
font_01_sfnt_off00006393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6393 19228 bytes
SHA-256: 58e814a1babce53e9bde60a314392c3579991570ae7e8fda3028b3fe26b04c68

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