Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ec7771113fb3ed…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 03:58:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d26f7e811284cad8a6e228df76713755 SHA-1: 8e95d48e3a3b4716799a6e52c23c8b1dd2ad4e35 SHA-256: 37ec7771113fb3edc27f8ac5ab8c0886048d797f21151b5ed1e02e415ba7d0a3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a 'link farm' designed to direct users to external sites, many of which are related to obtaining free Robux or Coin Master resources. The ML classifier strongly indicated maliciousness, and the presence of these links suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure.

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.tw/app/431946152/how-to-get-free-robux-no-human-verification-game-hack
    • http://libsmpn1balongpo.sch.id//repository/free-robux-generator-without-verification_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-link-daily_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/hacks-for-coin-master_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-roblox-hack_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/robux-hack-tools_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/hack-in-roblox-draw-it_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-without-surveys_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/promo-code-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-roblox-gift-cards_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-codes-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-link-2021-download_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/rbx-place-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-hack-mod-apk_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/roblox-games-com-free_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-chest-link_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id/repository/minecraft-pc-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032c1.bin
e326850adb2f8a495e931c6c5f05d20321e8e6e3e33d8c4c013957b652aae836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32C1 21688 bytes
font_01_sfnt_off00006262.bin
1b5d617a8bdf7849f857e8bf3a00ea7a9d2795cdb388484b070bb3e34f65ceb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6262 19496 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.