Malicious PDF — malware analysis report

Static analysis result for SHA-256 696163e12ce09409…

MALICIOUS

PDF

48.8 KB Created: 2021-06-08 12:39:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c57dbbb31ba4596ebdd298bcf2215474 SHA-1: 69f4c98095f493d708bdbafae5434ccf882e5347 SHA-256: 696163e12ce094092cc0dffab4e289d2150ab43f72ce9c494f723c6cd023e3ed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. These links likely lead to the download of a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-robux-works-in-an-hour-pastebin-game-hack In PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-player-radar-hack-site-https-v3rmillionnet_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005357.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5357 25692 bytes
SHA-256: 7dcfd31ab38d1df631386e3fc6042dcf50ff996216b11a77372e97971e38900a
font_01_sfnt_off00008f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2B 3096 bytes
SHA-256: d05729863dc05721ada29044278030255eeda038236568e8246a87d3a8573d6e
font_02_sfnt_off000099d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D7 18988 bytes
SHA-256: f7fcd3a399a39eec0207f711c9c748a1b19eb538ef94fffb9183388ac79b27a0

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