Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c1b9cd93655121…

MALICIOUS

PDF

53.0 KB Created: 2021-06-09 11:14:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 26689f9e9e52e18223b0b512d1d5ed77 SHA-1: 584e6bebf2e70b07c38db964fa065a8928967c7b SHA-256: a5c1b9cd9365512173126b0241082b39ebacf3dfabc7f65300b737f0f1211035
162 Risk Score

Malware Insights

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

This PDF document employs social engineering tactics by presenting a lure for 'free Robux' and game hacks. It contains embedded links that redirect to external websites, likely to facilitate the download of malicious payloads or lead users to phishing pages. The document also includes heuristics indicating a password-protected archive lure and a browser extension installation lure, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9616

Heuristics 6

  • 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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/how-to-get-robux-for-free-really-works-2021-game-hack PDF link annotation
    • http://library.atim.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-re_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/cheats-for-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-wings-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000541c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x541C 24888 bytes
SHA-256: 806f08fe9b28ff3717a737e3955652264cb2edab05794aa802fdba3d21db6c35
font_01_sfnt_off00008d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9B 8176 bytes
SHA-256: 2f3dbb6de8d938457d4d5144a9c1cd4c58b21791d1820bcb66a690a9d2a25b53
font_02_sfnt_off0000a8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8B7 19532 bytes
SHA-256: 8233685eef8f1b999dbd38305277e96298484bf43d6620efe0d9b3f71e631932

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