Malicious PDF — malware analysis report

Static analysis result for SHA-256 691cc724c80ce8b1…

MALICIOUS

PDF

31.6 KB Created: 2021-05-12 11:34:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d04c1a4112899a4c335cba7c82f33649 SHA-1: 1ec7470606eb695e91ef31b9585cd6602477ecae SHA-256: 691cc724c80ce8b1d62b93ec4450b81efe3687072191d19c62007489fa50c5af
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which are structured as SEO-optimized pages for game-related hacks and freebies. The primary URL, 'https://netcdn.xyz/app/406889139/free-coin-master-hack-no-verification-game-hack', suggests a lure for users seeking in-game advantages. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, reinforcing the scam or phishing nature of the document. No scripts were extracted, but the extensive link farm points to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-coin-master-hack-no-verification-game-hack
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/coin-master-fan-page-free-spins_GM406889139.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/free-robux-without-any-verification_GM431946152.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-trading-group_GM406889139.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox_GM431946152.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/coin-master-free-spin-download_GM406889139.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link-2021-today_GM406889139.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/play-minecraft-pocket-edition-for-free_GM479516143.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/does-coin-master-hack-work_GM406889139.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/coin-master-link-app_GM406889139.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spins_GM406889139.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/free-robux-with-no-verification_GM431946152.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/coin-master-free-pet-snacks_GM406889139.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-today_GM406889139.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/114-4-hacks_GM479516143.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/free-coins-and-spins-coin-master-2021_GM406889139.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/rape-simulator_GM431946152.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/hack-version-of-coin-master-apk-download_GM406889139.pdf
    • https://elearning.manbarsel.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-ios_GM406889139.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005059.bin
2924a773c49c4736ce0d40b3c16984d6f8ad176620b3fd2f265ddfb9bcca3dc5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5059 19677 bytes

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