Malicious PDF — malware analysis report

Static analysis result for SHA-256 8158706bac8ca7b2…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 19:57:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bce531c93b187728228256490caa7e5e SHA-1: 1edfe3e45b20ce01c1da85e1549076b73cbc8f07 SHA-256: 8158706bac8ca7b22195a762994b1e0d4cc75bc914d77457002bbf3ba7cd7aa8
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-roblox-intros-game-hack PDF link annotation
    • https://www.das-partners.com/uploaded_files/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/tiktok-free-view-iphone-theme_GM835599320.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/hack-roblox-pc-youtube_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/roblox-scripting-free-help_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-iphone_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_off00002fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD0 22220 bytes
SHA-256: bb3cea47732a7804a9c2428b325298d6c404375f182d9db55b62693e8669b633
font_01_sfnt_off0000610e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610E 18752 bytes
SHA-256: 6bf376b09816765e402d515af924a62be3fa0c3e098cc2a2b1f733bb65ab6f85

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