Malicious PDF — malware analysis report

Static analysis result for SHA-256 849cf2c8abc17bc6…

MALICIOUS

PDF

36.7 KB Created: 2021-05-15 23:32:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c5230be25af44c0ab786c888463d6a1a SHA-1: 59c92038636627a8129409c0a2f9bed607d2477e SHA-256: 849cf2c8abc17bc6ae2c4dd1ad83d24d05e51496ab1b9c4a3f33d66deed62fbd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at `https://netcdn.xyz/app/431946152/free-roblox-promo-codes-for-robux-game-hack`. These links are presented as lures for game-related cheats or generators. The presence of these links and the heuristic firings indicate the document's primary purpose is to redirect users to potentially harmful sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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.
  • 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/431946152/free-roblox-promo-codes-for-robux-game-hack In PDF document text
    • https://cleansui.com.tw/image/data/files/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/real-roblox_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/add-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-free-coins-facebook_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_off00004b2c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B2C 26252 bytes
SHA-256: 0b4e41910d08b6c1015598d8012e4999c841f266ffa28f68a155705b60904f16
font_01_sfnt_off000088e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E2 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139

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