Malicious PDF — malware analysis report

Static analysis result for SHA-256 59408ba2945bcd3a…

MALICIOUS

PDF

46.7 KB Created: 2021-05-16 08:00:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1e843ec32c32fb066691efe47abb4302 SHA-1: aa8fe7a397ca6a5d78be1009354b223f41e597bc SHA-256: 59408ba2945bcd3abbf62155f2bf24404aff8268fca209221f25465292ea5d29
200 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as a 'free generator' or 'game hack' for popular games and impersonating brands like Facebook. The primary lure is to trick users into clicking these links, likely leading to credential phishing or further malware delivery. No scripts were extracted, but the embedded links and heuristic firings strongly indicate a phishing and redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/how-to-get-free-robux-fast-and-easy-game-hack.
  • 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/431946152/how-to-get-free-robux-fast-and-easy-game-hack In PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/free-coin-app_GM406889139.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • https://thoisuviet.vn/public/ckfinder/userfiles/files/can-you-give-me-free-robux_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
font_00_sfnt_off00004be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE7 26880 bytes
SHA-256: c45c8fe3c17c735b5f92012c7f019ea640fb8779618df7dbb12e1edd84d1e2ce
font_01_sfnt_off0000881c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x881C 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9206 18864 bytes
SHA-256: 264ac3d9ee16189788a918c90b00fec891485e046f110455159a23ab28eb8c09