Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7d943671e721d1…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 16:06:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ad084a8cd9c728af658853da875839e2 SHA-1: 8636ccd55ad0a56ae8f3eacff254a0f24318cd12 SHA-256: 7d7d943671e721d1357439cc94fd7be22019c517834049088d81a50d12da133c
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are SEO-optimized and appear to be part of a link farm. The document body explicitly mentions "free Robux" and "free radio on Roblox," indicating a lure for in-game currency or items. The presence of a "download button" heuristic further suggests a malicious workflow aimed at tricking users into downloading potentially harmful content.

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/how-to-get-1-million-free-robux-breast-milk-game-hack PDF link annotation
    • http://www.compusiteinc.com/images/how-to-get-a-free-radio-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://www.compusiteinc.com/images/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/robux-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-to-get-free-purple-items-on-billionaire-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/robux-today_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-to-hack-yourself-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/apps-to-hack-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_off00003117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3117 22544 bytes
SHA-256: 5813d6442c6603d4c3c79a819e7e0600152c04a5086990adeebfc8e807e79b1c
font_01_sfnt_off00006377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6377 19464 bytes
SHA-256: aae41e1f3873460e7c696e4f4852d46b56a1ceffbc1c7d9c5ef389393efcb9cb

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