Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e78407f3b64d02f…

MALICIOUS

PDF

41.8 KB Created: 2021-05-16 10:23:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b78f3663756f5b7d355ba9b461d6801a SHA-1: 5584f7739ceaf98f55a64f6fa7cf463f570f7031 SHA-256: 6e78407f3b64d02ffb3fb708c4afa3df25ad12e98a29f14e7da483ced0b7bff7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded links pointing to various game-related cheats and hacks, suggesting a link farm or phishing lure. The ML classifier strongly indicated maliciousness, and the presence of numerous external URIs further supports this assessment. The document body, though heavily obfuscated, contains references to game hacks and a URL that likely serves as a download or redirect point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/479516143/minecraft-pe-game-hack PDF link annotation
    • http://neltalen.nl/images/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/www-robux-com_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://neltalen.nl/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/dailyrobux_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/minecraft-pe-017-0-apk-free-download-android_GM479516143.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_off00004a17.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A17 25204 bytes
SHA-256: aff44c27174be2dcc781c48eb7bd183539628a2f5b0c765ced6e784e7f44abeb
font_01_sfnt_off00008302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8302 17724 bytes
SHA-256: f2c518e24e430f5639c0522049ec6170810629e79e139cf24a514a2af733470f

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