Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa54518313e5706c…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 22:24:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: df0a0c737f7e48c7b71bda4988a150ec SHA-1: 7002ef4b855afa425e0243e04c1d4ecc7d1aa8c7 SHA-256: aa54518313e5706c6a247db5460c43e6db19f0b6ac763183786bd3847ff902f0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that promise game hacks and free currency for popular games. These links, including one to 'netcdn.tw' and several pointing to the IP address '110.232.83.89', are likely designed to redirect users to malicious sites or initiate further downloads. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution scheme.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/406889139/free-spins-and-coins-coin-master-2021-link-game-hack PDF link annotation
    • http://110.232.83.89/slimsppks/repository/roblox-hack-robux-4_GM431946152.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-time-glitch_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/va-a-ser-hackeado-roblox-en-2021-18-marzo_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/2021-free-robux-glitch-in-febuary_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-swearing-hack_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/minecraft-free-download-mac-full-version-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002fb9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FB9 22636 bytes
SHA-256: ddcdce58a03bcb9b09092728f8df46fb10bf5e85e7c319f46a0bc22d3a8c7553
font_01_sfnt_off00006279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6279 18920 bytes
SHA-256: 5da8567ac5cad1a9e8b19f4308895a295b9244689bea2bda45786747592bc9c5

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