Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6387f63a832416d…

MALICIOUS

PDF

43.2 KB Created: 2021-05-13 20:01:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2041c73718dec0200d6e056b62239caf SHA-1: f26b8a924c1033a0db36b9992fad7b28c4af2f54 SHA-256: b6387f63a832416d13dd55c9fedb446ea54c29d00637510d18e65fdc08a53b30
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'game hacks' and 'free generators'. The ML classifier also strongly indicated maliciousness. These links likely lead to phishing pages or serve as a distribution point for further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-spin-free-game-hack In PDF document text
    • http://sd-olimp.hr/files/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-do-you-hack-minecraft_GM479516143.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_off0000467f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x467F 24140 bytes
SHA-256: 140c238d72d2c95304d6f81906a2d5d9ee174255b865a1743a9f39fed78ef5da
font_01_sfnt_off00007db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB1 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8763 17884 bytes
SHA-256: f64f8d8cd546afe107dcd88d9ce91258665e3d619825ef5ba403a2abc0c27184

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