Malicious PDF — malware analysis report

Static analysis result for SHA-256 558a37a8365970dc…

MALICIOUS

PDF

44.0 KB Created: 2021-05-14 19:04:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cd4d53c5203297bbc6e4478515b7c228 SHA-1: f97d6e51beccc1ddd69302afb5a27fd25a6f5476 SHA-256: 558a37a8365970dc8bff877aa72d4271a8d909d916f8b71bd6e8d83a1c8d8905
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack generator, specifically for Coin Master. The document body and extracted URLs reinforce this, pointing to sites offering free spins and coins. This suggests a social engineering lure to drive traffic to potentially malicious or scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-and-coins-game-hack PDF link annotation
    • https://financia-business-school.com/static/upload/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/wurst-client_GM479516143.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-robux-net_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/roblox-fun-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_003_off00004bb1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB1 27188 bytes
SHA-256: 2438d2382acc6fb747860c591b3bc341621b05aa302490c84877728a314d08d3
font_01_sfnt_off00008a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A67 18060 bytes
SHA-256: 7f8980b6f3213b204c7b050e62c653166806b65682437d624869b2fc7a4cb6a7

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