Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75dc69847dc155a…

MALICIOUS

PDF

44.4 KB Created: 2021-06-10 23:21:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bbba73465e2907c5b384639c0e29b86e SHA-1: 123bd8fe7c596b386299d257b1afa6b7dc2fac5a SHA-256: b75dc69847dc155a7010c532860234dfaf3c6cbbfe9da3212d931cb9068aa00d
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 0.9865

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/boku-no-roblox-remastered-hack-script-pastebin-game-hack PDF link annotation
    • http://digilib.stimata.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/microsoft-free-robux_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_004_off00004f87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F87 24740 bytes
SHA-256: 931e47db2655dfb74aa019cc57ff7f6568244f2e55047a215f18ac40a0a27858
font_01_sfnt_off000087bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87BF 19308 bytes
SHA-256: 96813d25330b099a9d15a5e42a3e132a3b463562271d64a1db2f279d0b440902

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