Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45baa16038a1e7b…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 08:52:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 96194130800e7b95f6947e7750df71a1 SHA-1: ab72a166431f6b5258b366417eb5af3a48c5300c SHA-256: d45baa16038a1e7be00a176ac552702561fc208f26ce9aa634be8459cfa67f39
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/406889139/how-many-levels-does-coin-master-have-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/how-to-get-free-superhero-package-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-on-your-phone_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-script-executor-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/linoria-hub-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/get-robux-free-scrach_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-free-wordpress_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/skip-human-verification-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-win-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-tampermonkey-script_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-a-roblox-user-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/boku-no-legacy-roblox-free-spins_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-codes-2021-multiple-people-can-use_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-fortnite-game_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-promocodes-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-t-shirts-on-roblox_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_off00003353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3353 23132 bytes
SHA-256: cf08dd83615fd6a399485541f6d6a6bddb311a757dece6722bbafe88075ff9f6
font_01_sfnt_off000066fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FD 18532 bytes
SHA-256: 73519756161c219c9429bfa0cb2914b64f7e4f466f675339707cc65ed84bb154

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