Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3ee0e8b6b55661…

MALICIOUS

PDF

46.8 KB Created: 2021-05-15 07:30:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5bff257c6126d65487b08f4f2d949b1e SHA-1: 60f56617b2ba4656eca9b3a5f4c7d219cf1c1c67 SHA-256: 8f3ee0e8b6b5566167f81bfa2cfd4d311d4693f30fa2db8b9473d3ea5a4dca9d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized PDFs related to game cheats and free currency. The document body and extracted URLs suggest a lure for obtaining free Robux or Coin Master spins, which is a common tactic for phishing or scam operations. The presence of a visual download button further supports this, indicating an attempt to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/431946152/how-to-get-robux-for-free-2021-game-hack PDF link annotation
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/www-robux-us_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-app_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_off00004c45.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C45 31736 bytes
SHA-256: b9225a7ce85393c4458b70e88e35af146700940d066c0122632e79334c43b851
font_01_sfnt_off00009392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9392 18684 bytes
SHA-256: 65f445f0396e54760dd2a1edc1744209422bc48f29c35ea74a9bcb72e79f8b06

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