Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de18b76f234b78d…

MALICIOUS

PDF

41.6 KB Created: 2021-05-14 15:35:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2daca60612b1b7cebb80a4e0b1dc8c10 SHA-1: 80281b5223d62d9c29971193937454f53b8dd57e SHA-256: 7de18b76f234b78d335d05bc7094b89854471c71b554bc286ef995c3f2976e30
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically promoting "game hacks" and "free spins" lures. The document body and extracted URLs strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a high likelihood of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-free-spins-generator-no-verification-game-hack In PDF document text
    • http://winnerwater.com.tw/image/data/files/earn-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-robux-master_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/100-free-spins-coin-master_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
stream_003_off0000496d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496D 24336 bytes
SHA-256: 813c6a35ae6a47ea214612e3865e87ee92938cdffd815d31cd7f18b4f1b6bc23
font_01_sfnt_off000080de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DE 18020 bytes
SHA-256: cc763048b76c9189c14999db918bcac9f3f262aeea1a03aaf6cd39ac3f323e93

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