Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3b9ba5f1431ef2…

MALICIOUS

PDF

36.0 KB Created: 2021-06-18 09:31:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 09155206a723e4bcd11c533459cbb314 SHA-1: 3056af08792b0b2783c080c3fb9b978bf94faac8 SHA-256: 2a3b9ba5f1431ef20913eee262c349d992008a9245a59392b207564e61a2c466
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a link farm, strongly suggesting it is designed to redirect users to malicious websites. The document body and extracted URLs advertise 'hacks' and 'free items' for games, indicating a social engineering lure to encourage downloads. The ML classifier also flagged this PDF as malicious with high confidence.

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/roblox-change-date-of-birth-hack-game-hack PDF link annotation
    • http://sfera-express.ru/images/free-promo-codes-roblox-august-2021_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://sfera-express.ru/images/real-hack-for-robux-inspect_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://sfera-express.ru/images/hacked-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://sfera-express.ru/images/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://sfera-express.ru/images/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://sfera-express.ru/images/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://sfera-express.ru/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/free-roblox-gift-card-youtube_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/free-robux-hack-deutsch_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_off00003499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3499 22864 bytes
SHA-256: 5611bcf09aa86eb36eb95b0c3d5226c2ee5ca27fa8261021097c97dfd75b3e60
font_01_sfnt_off000067b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B3 19028 bytes
SHA-256: c08d70bef1b707a19395b61da6f1239d8a17ba49a87a5b88ab863cb52429576a

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