Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fba5551120dc68b…

MALICIOUS

PDF

52.9 KB Created: 2021-06-03 11:17:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e881053e2f4828a1069daecb11eec661 SHA-1: 8ebf2c66c5c250c075d2e23faef23f596407a67a SHA-256: 9fba5551120dc68bde15ab3c26979566a13e4c84d3ab041fb244c50ad2d46455
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for 'free Robux' and game hacks, directing users to the URL https://netcdn.online/app/431946152/free-robux-without-verification-game-hack. This URL is likely part of a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit user interest in free in-game currency or cheats to redirect them to a malicious site, potentially leading to client execution or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9614

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 https://netcdn.online/app/431946152/free-robux-without-verification-game-hack PDF link annotation
    • http://library.fisip.upnvj.ac.id/repository/robuxglobalcom_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/daily-spin_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-free-models_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000517b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517B 36252 bytes
SHA-256: 26e19140ed33f3aa19aa2e1fc2f1ecc3b1f8e1040ceda4a19cda6d54762b5152
font_01_sfnt_off0000a0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0D2 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off0000aa85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA85 18964 bytes
SHA-256: 5864977637737ef4e1bd5b7bfc66e5602b8aa3d3ed60f74fb5f96fd63c3aa8ef

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