Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d2773e21fb803f…

MALICIOUS

PDF

41.2 KB Created: 2021-05-16 02:43:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 27d3dabec505433f3511943cc1d61d1e SHA-1: b5380ba709e5fa1a273be8d1d5432bfa86f916c8 SHA-256: 69d2773e21fb803f7063e2db7d89938f764b8fc2d7d8463c26650330bf7d379a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that point to known malicious redirectors, disguised as 'game hacks' and 'free spins'. The primary redirector URL is https://netcdn.xyz/app/406889139/how-to-get-100-free-spins-on-coin-master-game-hack. This indicates a likely attempt to distribute further malware or phish users by directing them to malicious websites. The document body and heuristics strongly support this malicious redirection pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-get-100-free-spins-on-coin-master-game-hack In PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/master-free-spin_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/robux-game_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-daily-spins-coin-master-2021_GM406889139.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_off000048a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48A2 23900 bytes
SHA-256: 3e177710ab35238da7ddc5b65b1d0c2733745f8abd25908843db0325beedbc8a
font_01_sfnt_off00007e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E94 18328 bytes
SHA-256: 118bed2ee52f9a365e328bc160c828b8a450fef4f79d7a715d30d8386aa97d79

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