Malicious PDF — malware analysis report

Static analysis result for SHA-256 be498b772b708cf9…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 21:05:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d529bcefa5a5169383778501b2849dad SHA-1: 547fce4fa027a1e20a935851cf2889a21550704b SHA-256: be498b772b708cf9752294bfdcaa20c97ec3813d0306a368e0324d5e5ffb247e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The primary lure URL is https://netcdn.online/app/479516143/minecraft-realms-free-game-hack, which is designed to trick users into downloading further malicious content. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/479516143/minecraft-realms-free-game-hack In PDF document text
    • https://kojak-group.com/userfiles/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-free-play_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-com-free_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://education.minecraftIn 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_004_off000054e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54E5 24980 bytes
SHA-256: 4db8e2e46729bb9ce0b766c071188b6f44162f30b55064acb917d58954b86c6d
font_01_sfnt_off00008d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D05 3128 bytes
SHA-256: 801f6fa60decd1add2f223f91580103c35e150c924465f86a7a572b3e00674f9
font_02_sfnt_off00009745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9745 17900 bytes
SHA-256: badbc394cd8954733b164be5cc8c6ff402afbb9d7774d644eb4a8191a91f4c18

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