Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51494d0933f0e13…

MALICIOUS

PDF

47.2 KB Created: 2021-06-08 23:30:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 71b5d2097c1fe3802a9f26fae94664e8 SHA-1: 7dc48f8e5011b3ae2dc3cdadfae8d606091e11f9 SHA-256: e51494d0933f0e130275150d7a1ceaf0c1ca4675c1f976530e83fa64fd787d6f
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 0.9769

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.tw/app/431946152/hack-mot-de-passe-roblox-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/rbx-com_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/pokemon-go-free-hack-download_GM1094591345.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/earnrobux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/legit-coin-master-hack-no-human-verification_GM406889139.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_004_off00004e22.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E22 24968 bytes
SHA-256: 25bf776265c9f6d014e699e1b74cf1173e08583af18490347933a5126892520e
font_01_sfnt_off00008767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8767 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000940f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x940F 18804 bytes
SHA-256: 0ac94b7514113bcda13845054da0aa5018c9a8882d5df82ef82c653dc9c38cc8

Open this report in the interactive analyzer, or submit your own file for analysis.