Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f060af3de28b5f6…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 04:30:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ece7bb0d222dee64f18c9ec74f478236 SHA-1: 0ca78d6b0bf1154d4121225d2b7c2e8698454387 SHA-256: 2f060af3de28b5f65153bdebecac1433a7f22d9a9e8092b49653792312ec7435
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/how-do-you-get-robux-game-hack PDF link annotation
    • https://3qblocks.com.tw/image/data/files/cm-daily-spins_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-code-that-work_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-robux-5-million_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-a-lot-of-robux-hack_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-800-robux_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_off00002d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D02 21960 bytes
SHA-256: 160923ccadd9f9ca00ceb65d745bfc62d6257766b8df5ba4b238d11c89ccaf8e
font_01_sfnt_off00005db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB7 19148 bytes
SHA-256: 6aa1a359455049c4d302ae89b0ea3ccbecfe01f67b57fe80c0c8e563803ba4d8

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