Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03eebf3524fc031…

MALICIOUS

PDF

44.7 KB Created: 2021-05-11 05:45:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 91465d201fa671e778fd0b87078c6649 SHA-1: 0a27fccca18e3051f0748b1158c1aa2c80ca02e5 SHA-256: c03eebf3524fc031a748a1c49915341cc6ffee4b7af2eb9f0708353385366dda
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/coin-master-game-hack PDF link annotation
    • http://bepquannhu.vn/upload/editor/files/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004915.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4915 26152 bytes
SHA-256: 0c4840396be4ce0dd4fc79efb47e7e140f3187d59fdcad84a3760d8a151efd2c
font_01_sfnt_off000083a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A8 17544 bytes
SHA-256: 5ee316c89f58fa7ece53e10d1822e70a80b2e7ece9f31707ca69690d36fdc75d
font_02_sfnt_off0000a385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA385 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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