Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdda7086bc02fa80…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 10:11:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f6804e1c4650b9c1ac86bc949f745147 SHA-1: 17c0fe36cb580f41fe9abf5f8f798d35d421fcda SHA-256: bdda7086bc02fa808c4774cd76f7b1366acee04435fe00d8c3ea15a04be71bdb
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/431946152/2021-roblox-game-hack PDF link annotation
    • https://3qblocks.com.tw/image/data/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-free-followers_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/hack-to-get-money-in-gta-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/robux-hack-github_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-do-you-exploit-on-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-roblox-scripting-book_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-rare-cards-for-coin-master-christmas_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_off00002f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F11 22024 bytes
SHA-256: 826d6e12296c428a3edde8ceebb3389d64fed6a2bc495691653f70ac8e71eae2
font_01_sfnt_off00005fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBE 18888 bytes
SHA-256: 33ef63e005186671e8a4e4c52c6dbc977e36cf6478ccce69c93d79634960688f

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