Malicious PDF — malware analysis report

Static analysis result for SHA-256 5382cb7f98c93345…

MALICIOUS

PDF

44.7 KB Created: 2021-05-13 08:02:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7ba54459edd817927657d7a92bfedba3 SHA-1: 8131cc29f2b7142a27056e228add4d3d1c1b602f SHA-256: 5382cb7f98c93345df26395371eeedab8c12e3583ef33f577a97586c971f4bf4
160 Risk Score

Malware Insights

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

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The document body, though partially obfuscated, contains references to these lures and the primary malicious URL. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/coin-master-fan-page-game-hack In PDF document text
    • http://arhi-z.ru/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://arhi-z.ru/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://arhi-z.ru/images/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://arhi-z.ru/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://arhi-z.ru/images/websites-that-give-you-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
stream_003_off00004734.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4734 25964 bytes
SHA-256: 6e00bbf9bf0b89c52f76bbb212aa6979dd2a047574cdfd3e65b6b4d1fb6e0258
font_01_sfnt_off000082ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82ED 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9E 18152 bytes
SHA-256: fbcfa89843e3076b9754f2e6f7e38431cf5550f9a922de7ec0814201ac83b7bc

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