Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9b983470f70b95…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 07:35:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5ce725fa9db958a1f7b1f4c19cc4805d SHA-1: 6a6912a66f1e2f402f6456f025ef99b5b366552c SHA-256: ac9b983470f70b953366db71e0201730c2210b1450126b82b6107756c3195ac0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to a known malicious infrastructure, specifically advertising game hacks and free spins. The document body and heuristics indicate a lure for game-related cheats, likely intended to lead users to download further malware or engage in phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-promo-code-game-hack In PDF document text
    • https://luyenthitoanpro.com/public/upload/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/roblox-cheat-engine-bypass-2021_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/roblox-robux-generator-no-hack-2021_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/minecraft-free-education_GM479516143.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-ban-banhammer-roblox_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-robux-no-wait-unpatchable_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/account-hacker-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/free-robux-hack-no-survey-or-verification_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/cs-go-roblox-wall-hack_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/project-phoenix-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/best-free-robux-websites-with-no-surveys_GM431946152.pdfIn PDF document text
    • https://luyenthitoanpro.com/public/upload/files/300-daily-free-spins-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B1 22612 bytes
SHA-256: 636d2ef858a145a727e22b5e495ace3be2690edf96c58ec806a84a483daf0775
font_01_sfnt_off0000652c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652C 18760 bytes
SHA-256: f19908f223f6d81612d6a2bf6f73a33e849f8235d54350b1f471ed781f00ccd8

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