Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad237dbbc5ef259…

MALICIOUS

PDF

34.3 KB Created: 2021-06-26 21:15:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9d8d0a16dbb2ef3bb6b821e98caff985 SHA-1: 91cde31bb1d7da9118a92ded33d408717561e425 SHA-256: dad237dbbc5ef259ecd90c99e593ac87131507a2c812f8d6c098a53d90d81b78
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and 'game hacks', directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports a phishing or scamming attempt. No scripts were extracted, but the document's content and embedded links are designed to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-gruops-game-hack PDF link annotation
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-robux-using-script_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-get-free-adidas-shirt-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/chat-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/fake-hack-code-copy-and-paste-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/pokemon-go-free-100-iv_GM1094591345.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-robux-gift-card-25_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification-20212021_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-harley-quinn-hair-roblox_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/minecraft-java-edition-key-free_GM479516143.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_off00002fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBA 22348 bytes
SHA-256: c74f7d545f0b65fd2f348c8968b57b34e45e291444b29b2b193e4e51ea0a6c0c
font_01_sfnt_off00006186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6186 18892 bytes
SHA-256: 658c6e5c6a4783fc48004689bb7a47c53e6b1b0218e82afd5501c12746add288

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