Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bdd9835aa0ba0e0…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 08:38:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: abb53680d4a7b9c014253cf22906b75c SHA-1: 5bbf497ebdeefe662f1d27ab055e94b6f24bf448 SHA-256: 2bdd9835aa0ba0e0712f3f4d1e8080ef733b7bf673cffcfbdc2f9bf63a369c35
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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.online/app/431946152/what-is-a-robux-game-hack PDF link annotation
    • http://library.umuslim.ac.id/repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/robux-redeem_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/mcpe-hacks_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-apps-that-work_GM431946152.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_off00004f27.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F27 26500 bytes
SHA-256: bcc6748df7f1257080ff274f15cdead47439b4152428abe083cbeab903d75530
font_01_sfnt_off00008bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAE 2820 bytes
SHA-256: 34dd21cbcbbf8680f9624d5ddfa25e49232e6768200f74ddacb5347fd7a5f6dc
font_02_sfnt_off0000954f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x954F 18548 bytes
SHA-256: 3316b7a4d548223335f333f1efaf0184c5ffecf7c7bacabb6dd9a6d8e3ca5dd1

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