Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb0c05fff7448df…

MALICIOUS

PDF

43.8 KB Created: 2021-05-13 02:12:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 48e49c6ac774236863f45e9b49d79ea4 SHA-1: 4bec08d165f1db85ba31f7725642868b8e15e333 SHA-256: 7fb0c05fff7448dfe794567748a8974a16112e9a24dcb72325599ec293d01a71
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple external links and a heuristic firing for a game hack lure, indicating a social engineering attempt. The document body and extracted URLs suggest the intent is to trick users into visiting malicious sites, likely for credential harvesting or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/406889139/coin-master-hack-mod-apk-unlimited-spin-download-game-hack PDF link annotation
    • https://sunnygarden.com.tw/image/data/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/make-robux_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/cone-master_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-re_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
stream_003_off00004c95.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C95 25136 bytes
SHA-256: ac3be0ed6eb116a11293c36f98249557338fd11f41fd28ab0a4139869e0ea143
font_01_sfnt_off000086e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E4 18916 bytes
SHA-256: 235aea5ebbb4512cfbc9f8a1b45f63981b2319364ea35e3ec6b5ee3ddf49ad62

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