Malicious PDF — malware analysis report

Static analysis result for SHA-256 833d190d5ec841c1…

MALICIOUS

PDF

43.5 KB Created: 2021-05-16 17:29:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 351db397a105baeb7e0735bc22110b75 SHA-1: bf6fe050d44ef62149577535b0993ef8c7fd471f SHA-256: 833d190d5ec841c1592a0a8d83ca00359558ad31ee0512b00321a78ede88a2e0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which are structured as SEO-optimized PDF gateways. These links point to pages offering game cheats and hacks, suggesting a lure for users seeking unauthorized advantages. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/coin-master-free-spin-sites-game-hack
    • http://www.homesweethome.pl/images/free-apk-mods-coin-master_GM406889139.pdf
    • http://www.homesweethome.pl/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdf
    • http://www.homesweethome.pl/images/coin-master-free-spins-and-coins-haktuts_GM406889139.pdf
    • http://www.homesweethome.pl/images/coin-master-exchange-40-free-spins_GM406889139.pdf
    • http://www.homesweethome.pl/images/coin-master-game-hacking-tricks_GM406889139.pdf
    • http://www.homesweethome.pl/images/minecraft-apk-download-v1-144-2-free_GM479516143.pdf
    • http://www.homesweethome.pl/images/coin-master-free-spin-and-trading_GM406889139.pdf
    • http://www.homesweethome.pl/images/how-to-actually-get-free-robux_GM431946152.pdf
    • http://www.homesweethome.pl/images/free-robux-download_GM431946152.pdf
    • http://www.homesweethome.pl/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://www.homesweethome.pl/images/coin-master-gold-cards-free-2021_GM406889139.pdf
    • http://www.homesweethome.pl/images/roblox-admin-hack_GM431946152.pdf
    • http://www.homesweethome.pl/images/coin-master-extra-spins_GM406889139.pdf
    • http://www.homesweethome.pl/images/collect-robux_GM431946152.pdf
    • http://www.homesweethome.pl/images/rbx-hut-promo-codes_GM431946152.pdf
    • http://www.homesweethome.pl/images/free-minecraft-windows-10-account_GM479516143.pdf
    • http://www.homesweethome.pl/images/minecraft_GM479516143.pdf
    • http://www.homesweethome.pl/images/coin-master-cheats-2021_GM406889139.pdf
    • http://www.homesweethome.pl/images/robux-converter_GM431946152.pdf
    • http://www.homesweethome.pl/images/coin-master-32-hack-apk-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000472b.bin
03eeaa84f6b793b697815ed9aebbdc3112dfaa638537c91e7c83893cf2b34861
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x472B 24176 bytes
font_01_sfnt_off00007e78.bin
d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E78 2868 bytes
font_02_sfnt_off00008863.bin
7b855ef2bb944b5b370c61480927ccad63ff31bdbf820bc1f0da9d35a10f5fb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8863 17884 bytes