Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b35291076fc1e0…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 05:10:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 01a7fc9601bceaa3727271b821483fc2 SHA-1: 1d0603fa39e889427326e5d090fb4bbf0e957a75 SHA-256: 36b35291076fc1e0320752d0b7d15d9ab4faa17e4cf2e45843d0525a256f6aaa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The primary lure appears to be related to Coin Master and Roblox, aiming to trick users into clicking through to potentially harmful content. The ML classifier strongly indicated maliciousness, and the presence of known malicious redirector links supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/daily-free-spins-coin-master-game-hack In PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/scp-site61-roleplay-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/tiktok-free-shares_GM835599320.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/static-moonactive_GM406889139.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/go-through-walls-hack-roblox_GM431946152.pdfIn PDF document text
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/termianl-railway-roblox-hack_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_002_off000032f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F2 22952 bytes
SHA-256: 430cd64cc0a20302e1dd2221f903b930010450697c6e1479a43f7ee7d08b61ad
font_01_sfnt_off000066a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A0 18596 bytes
SHA-256: e1561e5ad11d6fa371b43628261e275aedbbfff84e2cc2a1b863fefe4a2dbfc2

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