Malicious PDF — malware analysis report

Static analysis result for SHA-256 af06f6efbc554f09…

MALICIOUS

PDF

43.0 KB Created: 2021-05-12 03:15:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4425053f55bcf0857cdbd06e75c362e5 SHA-1: 8ffbb076a3fbdad279e0afcc0714e75bbedc9edf SHA-256: af06f6efbc554f09cc6d8805a73d131db1cddebdf534abf4c541a51181d5870a
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or social engineering attack. The primary link directs users to 'https://netcdn.xyz/app/406889139/how-to-hack-coin-master-game-hack', likely serving as a gateway to further malicious content. The presence of a visual download button and the overall structure suggest an attempt to exploit user interest in free game-related content to drive clicks to potentially harmful sites.

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-hack-coin-master-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/wurst-client_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-golden-cards-hack_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
stream_003_off00004dfd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DFD 24868 bytes
SHA-256: 357c5850e8dc7b3d6c6d9282aee5ea7ea0226b3a1d1943c58a809a5271920b98
font_01_sfnt_off00008712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8712 17880 bytes
SHA-256: 811ddb8557bc0f5be85009fa6d5ae0baa2b7fc09c58d91c5790597872cecd122

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