Malicious PDF — malware analysis report

Static analysis result for SHA-256 1433b09b72759f1c…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 18:54:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: eb773726e6b0fb3d1e63abaa931ef44d SHA-1: a3b66bcae716a40b2fc2e69282d50cf384213311 SHA-256: 1433b09b72759f1c7645cb9ddb1675c636e093fcc44efca3392294342c84acab
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 0.9980

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 http://netcdn.tw/app/431946152/free-robux-only-username-game-hack PDF link annotation
    • http://abdinusababellibrary.ac.id/repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/hacking-roblox-zombie_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/roblox-free-robux-giveaway-live-2021_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/how-to-hack-peoples-password-on-roblox_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/hacks-para-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
font_00_sfnt_off00002e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E83 21700 bytes
SHA-256: cb062a002ce2bc790e08362622319b26db6a123335b6508341b94d82326dfc6b
font_01_sfnt_off00005e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5C 19228 bytes
SHA-256: 6dddefc2d48c7f37f50c1a6b710d30cd99cee34b64e744400aeeb56817a3b712

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