Malicious PDF — malware analysis report

Static analysis result for SHA-256 27593d8a04a90934…

MALICIOUS

PDF

34.9 KB Created: 2021-06-19 07:47:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 70777c62b1426e14ecd4b177d00aea3c SHA-1: 0ac61d7937661661c16f6da965b22aa03c0bad3c SHA-256: 27593d8a04a9093413bb251711d0ad3fb50d8b164ebb560285a92f844560702d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as "game hacks" and "free generators" for popular games. The primary lure URL is http://netcdn.co/app/431946152/how-can-you-hack-into-someomes-account-in-roblox-2021-game-hack. This indicates a phishing or scam attempt designed to lead users to potentially harmful content or further malicious downloads.

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.co/app/431946152/how-can-you-hack-into-someomes-account-in-roblox-2021-game-hack In PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4D 22328 bytes
SHA-256: 1cb481fed6f6f05eab98fa8440d5e970bd9080caeebb9000db1c608e12fa64bd
font_01_sfnt_off000060cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CF 19888 bytes
SHA-256: d4b9aeafdf74cf4c894673a7413907974e0e6275bf4bb82d03fecbfd46893b5f

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