Malicious PDF — malware analysis report

Static analysis result for SHA-256 deba32eac47b3c86…

MALICIOUS

PDF

42.2 KB Created: 2021-05-14 04:33:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 50dca8bb7c48c721513e7c195b416110 SHA-1: bcfb5a7b08b1a9a7d75a99079cf8c66887853fa7 SHA-256: deba32eac47b3c86a0bb738f6317c35c005eb235293387c6155142a99d88f19c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, many of which are structured as SEO-optimized links pointing to game-related hacks and free currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a malicious attempt to drive traffic to potentially harmful content. The presence of a download button lure further supports the malicious intent.

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/corn-master-game-hack PDF link annotation
    • http://ines.co.rs/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-spins-coin-master-november-2021_GM406889139.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_off00004aea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AEA 25592 bytes
SHA-256: bbf8e52a140e2c0859a207385701e479be34cf2bb22d76725d6909c3f5bc134a
font_01_sfnt_off00008537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8537 17428 bytes
SHA-256: bb7ddfb5eeb119ecc025e94c1b8f2696886702df12a5472958d742496d82a376

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