Malicious PDF — malware analysis report

Static analysis result for SHA-256 8addc7eab624cf36…

MALICIOUS

PDF

34.1 KB Created: 2021-07-09 06:07:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f40523477ed64be7e4a40501e11ca5d4 SHA-1: 3b898b1a6d95dfe1745897e5fd47b63f691e9298 SHA-256: 8addc7eab624cf36cc258b10e4b3e1cf1dd5cf901273f3e6cabf7971c529be12
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/how-to-free-robux-game-hack PDF link annotation
    • http://niceviaapia.com.br/images/ckfinder/files/pubg-uc-kart_GM1330123889.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/dungeon-quest-roblox-hack-free_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-roblox-dress_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/counter-blox-roblox-offensive-hack-download_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-hack-all-the-cargo-crates-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-dragon-ball-infinity-saga-hack_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/robux-hack-generator-no-veriy-100_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/cheat-roblox-lumber-tycoon-2-fly_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-tango-face-roblox_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-stuff-on-roblox-with-codes_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/no-human-verification-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/tiktok-free-website_GM835599320.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_off00002f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F93 22208 bytes
SHA-256: 8ef54f3e4075a80e03882e055c1e081ba0d53a937520ada6ff3eabe6aaad19c5
font_01_sfnt_off000060ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AB 18880 bytes
SHA-256: b6c4639a0efa27a474f01e4d286fb143e2370880626048fbfb2abea6535030cf

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