Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b58161f6eacf1a2…

MALICIOUS

PDF

33.4 KB Created: 2021-06-18 19:00:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8f5dd7bcbf55e5297c46e8ebdfc7768c SHA-1: 8f9b7f17bd71752f46c7839e74d557263378108b SHA-256: 1b58161f6eacf1a2498f13174d3e3327ca44e31e87cb649a9afe17a46627b90e
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a heuristic firing for a PDF link farm, indicating a likely attempt to direct users to malicious content. The document body text and URLs suggest a lure related to game cheats and hacks, such as for Roblox and Coin Master. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/best-free-roblox-schirts-game-hack PDF link annotation
    • http://sbm-nn.ru/images/como-tener-los-hacks-de-xonnkek-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-for-robux-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/real-working-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-do-you-get-free-robux-no-hack_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/robuxian-com-free-robux-code-generator_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-sharingan-free_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-devil_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/como-conseguir-robux-gratis-2021-sin-hack_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-how-to-hack-robux-with-cheat-engine-64-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB7 21928 bytes
SHA-256: 1da329bfbc1240ecd73be18b689abb84de18af04fe0ca18c51f5693975106613
font_01_sfnt_off00005dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFB 18856 bytes
SHA-256: 39daaaf79d3f7eef06990dca1b6b7e9ae3e5e9ef1f1aa54a88ccbc33909f316a

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