Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48be996cfd82132…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 20:42:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 90624637c609178905299e699e892f1c SHA-1: f85390a967a5fc8f17a7616481ef778244c52879 SHA-256: d48be996cfd82132c6b21f9f6b375f841a728d81429616d473b05150e349d7fa
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-games-that-actually-work-2021-game-hack PDF link annotation
    • https://ivalue.tw/files/ckfinder/files/coin-master-fan_GM406889139.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/free-roblox-limited-items_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/free-robux-generator-2021-2021000_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/cheat-engine-roblox-youtube_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/roblox-hack-no-human-verification-android_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/how-to-make-your-roblox-account-hackerproof_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/i-can-hack-u-robux_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/ad-why-cant-have-robux-for-free_GM431946152.pdfIn PDF document text
    • https://ivalue.tw/files/ckfinder/files/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0B 21608 bytes
SHA-256: 2d7476da6e18ba2faf6ba48d0af3bd7dd2e0f0066904d00e993faa79d762cccc
font_01_sfnt_off00005e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E95 20272 bytes
SHA-256: 3dcbb05b4dce0a2bab4a10db55923dcb732eb0f4a2e9bcb9735c66d658b8cabb

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