Malicious PDF — malware analysis report

Static analysis result for SHA-256 782c9cd057da40be…

MALICIOUS

PDF

43.2 KB Created: 2021-05-13 08:15:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 98ac4623590ada3749538112dddaf687 SHA-1: 22cfb27749436ad6c485bcd8af0b63dfb0e1a4ea SHA-256: 782c9cd057da40be6f97be495ed84eb0f8fa047764e819b9387970b68ed56d4f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9969

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/free-roblox-accounts-2021-with-robux-game-hack PDF link annotation
    • http://mohacad.com/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/robux-survey_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-2021_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_003_off00004a9a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9A 25756 bytes
SHA-256: 528e16e7cfd48137631a10f946564df11ddc2c3de3e83009f96e1f2e1866b265
font_01_sfnt_off0000841f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x841F 19076 bytes
SHA-256: a3899638bf51e335cbc40673d1471e0832e9a39f88469ef4ed0809ba61e6f618

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