Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b50755cf833252…

MALICIOUS

PDF

45.2 KB Created: 2021-05-11 22:37:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e79aeecf245f1f708f1c630283610e9a SHA-1: ca128dc92b8a1cf90f01bcf78a2d55d97a6ec04a SHA-256: b1b50755cf833252cb6985439e8be43a6d8c99c61e8c0d822c9a3b5a12323a10
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and lures users with 'game hack' and 'free generator' themes. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/freespinandcoin-game-hack In PDF document text
    • https://alisa.com.tw/upload/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/rbx-hut_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-bobux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/dailyrobux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000488e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x488E 26576 bytes
SHA-256: 28154bf9034567cfc53a5c3d40232f599f7c838c9c6dd237931db37c095718d7
font_01_sfnt_off00008564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8564 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F15 17956 bytes
SHA-256: 1c693cd3c749c7deb88a93ce437f6f23953c7e7e8560ccdde2498ee9463f8dc4

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