Malicious PDF — malware analysis report

Static analysis result for SHA-256 161881a752f6fcfa…

MALICIOUS

PDF

46.1 KB Created: 2021-06-02 20:43:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0404e802f5461e871fd676ca07e9b07b SHA-1: 78015bdc9fe50dcbe593e2b918422c381d74332f SHA-256: 161881a752f6fcfaaf72594a309a36e3bb5df2dc54fd000d4a020f37c9a5e790
142 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 PDF files hosted on suspicious domains. The document body, though partially corrupted, suggests lures for game hacks and free currency, aligning with common phishing and malware distribution tactics. The presence of a password archive lure and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/robloxs-codes-free-2021-game-hack
    • http://shiny-nn.ru/images/hack-pokemon-go-free-download_GM1094591345.pdf
    • http://shiny-nn.ru/images/coin-master-free-coins-link_GM406889139.pdf
    • http://shiny-nn.ru/images/coin-master-spin-link-hack_GM406889139.pdf
    • http://shiny-nn.ru/images/free-robux-scams_GM431946152.pdf
    • http://shiny-nn.ru/images/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://shiny-nn.ru/images/coin-master-free-pet-food-links_GM406889139.pdf
    • http://shiny-nn.ru/images/free-robux-for-kids-no-verification_GM431946152.pdf
    • http://shiny-nn.ru/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • http://shiny-nn.ru/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://shiny-nn.ru/images/coin-master-hack-tool-without-verification_GM406889139.pdf
    • http://shiny-nn.ru/images/free-attacks-coin-master_GM406889139.pdf
    • http://shiny-nn.ru/images/coin-master-free-stars_GM406889139.pdf
    • http://shiny-nn.ru/images/coin-master-links-to-get-free-spins_GM406889139.pdf
    • http://shiny-nn.ru/images/free-games-like-coin-master_GM406889139.pdf
    • http://shiny-nn.ru/images/blox-supply-free-robux_GM431946152.pdf
    • http://shiny-nn.ru/images/why-is-tiktok-free_GM835599320.pdf
    • http://shiny-nn.ru/images/coin-master-free-spins-and-coins-generator_GM406889139.pdf
    • http://shiny-nn.ru/images/how-to-get-free-robux-instantly_GM431946152.pdf
    • http://shiny-nn.ru/images/coin-master-hack-online-cheat_GM406889139.pdf
    • http://shiny-nn.ru/images/minecraft-diamond-finder-hack_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051c4.bin
05f1b91ec7427e1e55820727de1ceb8fff289998cef6627d500cdffacc151d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51C4 26028 bytes
font_01_sfnt_off00008c2f.bin
3b21fad6292f8f6a2968b1ce53b629ea77fab8114b7f48aae19c6e2ecc0b39c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2F 20056 bytes

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