Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdff5d710d62d254…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 12:41:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 28d5f7581c8b27c65b883ddd30788f86 SHA-1: a85d2a13d9e2c6acef5d93e9e689682ef53473ce SHA-256: cdff5d710d62d25408a15924cea4be9d8066d421fb5df3c52f60b67484aa3d94
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.tw/app/431946152/free-robux-apps-that-work-game-hack PDF link annotation
    • http://www.pspmrsmlangkawi.com/opac/repository/free-roblox-city_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/roblox-hack-shirt-id_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/roblox-welcome-to-bloxburg-money-cheat-july-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/roblox-colouring-in-free-download_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-hack-roblox-accounts-with-edit-this-cookie-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/cheat-for-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/roblox-com-hack-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_off00002f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F19 22348 bytes
SHA-256: e5278834de9c14649b7731f194f3b5552918d3e339fa1b039782b93e668ea403
font_01_sfnt_off000060bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BF 19528 bytes
SHA-256: 3ce59685ce564c47d51d5d1714b73889d1d344349ceb90d9e3a1730e11095f67

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