Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b035764b6c94621…

MALICIOUS

PDF

35.2 KB Created: 2021-06-22 09:51:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bc02e482117a3c74bcfa933458df271f SHA-1: 3548d23e569c26022a8447397482c7195cce2e00 SHA-256: 1b035764b6c94621711db6165d0d9e01a6eb6a9569d7b672524effb32b0632fe
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free in-game currency, a common lure for malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports a malicious intent. While no scripts were explicitly extracted, the document's structure and embedded URLs suggest it is designed to redirect users to potentially harmful sites, likely for malware download or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.co/app/406889139/coin-master-daily-free-spins-link-today-blog-game-hack PDF link annotation
    • http://www.sharp-calculators.com/files/ckfinder/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/robux-generator_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/update-coin-master-free-spins_GM406889139.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_off0000308a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x308A 23000 bytes
SHA-256: fb7d3494a32e4e8d994db8a7b0c4df1f0c99bbf819cf012fe53b320ebbddb9cd
font_01_sfnt_off0000643a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643A 19156 bytes
SHA-256: 09b1cdc1283068c485bfced7c85533ce23b9c20e7767d1eac4088bba3ec2de37

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