Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d56c149467f9ce8…

MALICIOUS

PDF

46.0 KB Created: 2021-06-04 03:03:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 366f5708af260d0e4b1bd56452d20d0e SHA-1: dc1884ec3e78971513aa4e42c3beb6d418922e23 SHA-256: 9d56c149467f9ce8739b79e8f91b2ad3cd0d435d368335819e70bf5bc42dad22
160 Risk Score

Malware Insights

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

This PDF document employs a lure to trick users into clicking a link for a 'game hack generator'. The link redirects to malicious infrastructure that hosts further PDF files, indicating a multi-stage download or redirection chain. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection and lure techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/toolbox-apk-game-hack In PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-premium-roblox_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
stream_004_off000054c7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54C7 28256 bytes
SHA-256: 725e8260fdedeeefce1c0e61fd7ef38296f0d47542c44bc340bd50a0f18cbade
font_01_sfnt_off00009246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9246 18048 bytes
SHA-256: 646fad9d756b15d24d99e1fc175dfd3628bdaadc493ae9366c014baed99d5fea

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