Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b870328b3fde85…

MALICIOUS

PDF

46.4 KB Created: 2021-06-08 11:11:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c4a4061dbe38ae4582f71491501ead70 SHA-1: b647f6989a5d16b272a7d28ce146ea6287b72e9c SHA-256: 19b870328b3fde85c796b6a79afe0b7263f9381a5c35624fccc2d35af3e9472e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, pointing to external websites. The document body suggests a lure related to obtaining free Robux, a common tactic for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of many external links suggests an attempt to redirect users to potentially harmful content or for SEO spam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/como-conseguir-robux-gratis-en-roblox-2021-hack-game-hack PDF link annotation
    • https://lesegais.ru/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://lesegais.ru/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/daily-coin-master_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/free-coin-spin-daily-link-coin-master_GM406889139.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_off000051c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51C3 27844 bytes
SHA-256: 900b45d4866e640022e1fecc609654dacf84ca238904b01410d4b0f1e2d00838
font_01_sfnt_off00008f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F33 19496 bytes
SHA-256: 1803477249f5e65c1c81648c5efd9ff95bd4fbb3d0f2b55ea822dacd02bbdb5e

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