Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc09cbd7609e00ad…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 12:14:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 11a4e319b4889a76e854e37dc58605b2 SHA-1: 0ed0d0521eafb9ec52affcfa911897754e83e18b SHA-256: fc09cbd7609e00adefd9b8f71681bec8709290f1b6e887be41c3f018d4f5f197
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with a primary lure pointing to a 'coin-master-100-spin-slot-game-hack' page. This heuristic, combined with the ML classifier flagging the PDF as malicious, strongly suggests a social engineering attack. The document's content and linked URLs indicate an attempt to trick users into visiting potentially malicious sites for game-related cheats or virtual currency.

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/coin-master-100-spin-slot-game-hack PDF link annotation
    • http://cleansui.com.tw/image/data/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-back-your-account-from-a-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/pubg-uc-seller_GM1330123889.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/hacker-hair-roblox_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-lvl-7-hack-trial_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-email-hack_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-roblox-codes-murder-mystery-2_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/best-all-round-roblox-gui-script-hack_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_002_off000031a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A1 23404 bytes
SHA-256: 82587963132c2eb45ba87ab659c74583bfe8d49013101eb521f45236a9aec1f3
font_01_sfnt_off00006684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6684 18364 bytes
SHA-256: 88797bd407c711461b4daf793cee71082bf3bd1979785ca26b5cf25185c1003e

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