Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3a477a6111b34c…

MALICIOUS

PDF

36.0 KB Created: 2021-07-03 17:35:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8e606690149ab456d7a9f5cfebe838e8 SHA-1: 1228d1effc88f87d67811b563d74b51bdead9a64 SHA-256: dd3a477a6111b34c6fc08352d4c2e3a1a102e839d2b9924c5d9b85a4a1134092
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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-hack-no-human-verification-game-hack PDF link annotation
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-robux-hack-inspect-element_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-simulator-script-roblox_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/roblox-why-are-there-no-free-clothes_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/roblox-unboxing-damage-hack_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/rxfastml-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/robux-hack-no-download-2021_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/pubg-uc-price-list_GM1330123889.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-fan-page-facebook_GM406889139.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_off00003367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3367 22708 bytes
SHA-256: b21ba2c0c24b8aefaf62505ee534f553600e29dc93cfb9754470761e9cc31307
font_01_sfnt_off00006663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6663 19504 bytes
SHA-256: eb8ce7e3da5a97c3b4f0a1013d81a421e960dbc6320d0a210e145d8bed029be0

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