Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9839411f1155ca…

MALICIOUS

PDF

37.6 KB Created: 2021-05-23 20:49:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d9ca5413d5440146237b8df600a32d79 SHA-1: 302a4c5a1cf791eb1500d423f34d225c89b60266 SHA-256: 6b9839411f1155ca4f51fa4d7c6675c845c9234723f443e5e584598f8ed70eff
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to a site offering 'free robux'. The ML classifier also flagged the document as malicious. The document body and embedded links suggest a lure for a scam, likely related to in-game currency or other virtual goods, to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/robuxlove-.net-free-robux-game-hack In PDF document text
    • https://www.gvandenakker.nl/images/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-roebucks-com_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/tiktok-free-tv-shows_GM835599320.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-robux-generator-2021_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
stream_002_off0000349c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x349C 26992 bytes
SHA-256: eed5117d0a3ebd58714504f06b44b8152835fd36385d44c3c57501d5a8e6e40e
font_01_sfnt_off000071a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A3 18372 bytes
SHA-256: 65db4e182113fd1a8aa6d8046ef53f92d54fa7b6a505b130f920b75136a01eb1

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