Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3536e88a56c4fd1…

MALICIOUS

PDF

40.9 KB Created: 2021-05-11 23:30:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f06144a7b17fc8c9690fb97015c4ac77 SHA-1: 7050eb1c03945b3a6a2c51740ea568e52d3ea5c4 SHA-256: b3536e88a56c4fd1bb77932dc0fd3bd0263dd6229d0245af3f1cf72f42a6b031
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to websites offering game cheats and hacks. The ML classifier strongly indicates maliciousness, and the presence of numerous links to potentially malicious domains suggests a link farm or phishing attempt. No scripts were extracted, but the document structure and embedded URLs indicate a lure for users to visit external sites.

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/406889139/static-moonactive-net-rewards-game-hack
    • http://nalmpantistractors.gr/images/coin-master-no-download-app-but-play-for-free_GM406889139.pdf
    • http://nalmpantistractors.gr/images/free-2021-robux_GM431946152.pdf
    • http://nalmpantistractors.gr/images/how-can-i-play-minecraft-for-free_GM479516143.pdf
    • http://nalmpantistractors.gr/images/coin-master-cheats-2021_GM406889139.pdf
    • http://nalmpantistractors.gr/images/get-robux-com_GM431946152.pdf
    • http://nalmpantistractors.gr/images/how-to-hack-roblox-passwords_GM431946152.pdf
    • http://nalmpantistractors.gr/images/coin-master-free-daily-spins-link-2021_GM406889139.pdf
    • http://nalmpantistractors.gr/images/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://nalmpantistractors.gr/images/coin-master-free-attack-hack_GM406889139.pdf
    • http://nalmpantistractors.gr/images/apk-hack-coin-master_GM406889139.pdf
    • http://nalmpantistractors.gr/images/how-to-add-mods-to-minecraft-pe_GM479516143.pdf
    • http://nalmpantistractors.gr/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdf
    • http://nalmpantistractors.gr/images/free-coins-on-coin-master_GM406889139.pdf
    • http://nalmpantistractors.gr/images/free-robux-codes-generator-no-verification_GM431946152.pdf
    • http://nalmpantistractors.gr/images/get-free-robux_GM431946152.pdf
    • http://nalmpantistractors.gr/images/daily-free-spins-coin-master_GM406889139.pdf
    • http://nalmpantistractors.gr/images/coin-master-heaven-daily-free-spins_GM406889139.pdf
    • http://nalmpantistractors.gr/images/how-to-get-free-unlimited-robux_GM431946152.pdf
    • http://nalmpantistractors.gr/images/scaffold-minecraft-hack_GM479516143.pdf
    • http://nalmpantistractors.gr/images/coin-master-apk-hacked-3526_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046ab.bin
73a0170c5b21475eb307b1b7245f9580e36c1bc62cf2976e60bd0bde548e90f6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46AB 24320 bytes
font_01_sfnt_off00007e30.bin
9966684b9b98ae9c159578c69a57ea9c5c22f2a0e556d50b45713339f77195c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E30 18000 bytes

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