Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a409700527be87f…

MALICIOUS

PDF

35.0 KB Created: 2021-07-01 06:26:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3aea285cb01772711c35771eb65d3551 SHA-1: f86b89bd1b5b3f8ed896aa499e93a0eea7cbe368 SHA-256: 0a409700527be87f2009ff1ac5d857077afa3d03aa87356f30ab3b454bad5ce8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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-codes-no-human-verification-game-hack PDF link annotation
    • https://www.das-partners.com/uploaded_files/userfiles/files/roblox-pokemon-cheats_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/robux-hack-wiki_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/cool-clothes-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/roblox-robux-hack-tampermonkey_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/compte-a-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/fort-wars-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/coin-master-map_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/free-coin-master-account_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/how-to-get-robux-for-free-2021_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_off000030a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A4 22428 bytes
SHA-256: d7f37843127641b6789e8bb87f367c5ef6a0080e6cf3cfac4c489f26e530ce6e
font_01_sfnt_off00006299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6299 19508 bytes
SHA-256: 2dfde449b123a820f71ecd143a07ff41e89d4c72f15aa4e6fc945965a2c79889

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