Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd8500bd62895b9…

MALICIOUS

PDF

40.7 KB Created: 2021-05-10 16:01:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2f299c15b813775276e03f35396d10e9 SHA-1: 4cc9279450eb050821d8649b15044306f91f3d3d SHA-256: 6bd8500bd62895b980d06e34d5949fc29985b34efefb5f00532e4e3dea2f9dcb
62 Risk Score

Malware Insights

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

The document contains multiple embedded URLs and a prominent external URI pointing to sites offering 'free Robux' or game hacks, indicating a lure for potentially malicious downloads. The 'SE_DOWNLOAD_BUTTON' heuristic further supports this, suggesting a call-to-action to download content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-free-robux-without-paying-game-hack PDF link annotation
    • http://sostactical.ca/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://sostactical.ca/images/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://sostactical.ca/images/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://sostactical.ca/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://sostactical.ca/images/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://sostactical.ca/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sostactical.ca/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://sostactical.ca/images/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sostactical.ca/images/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://sostactical.ca/images/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sostactical.ca/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://sostactical.ca/images/coin-master-free-pin_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_off00003f9c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F9C 25764 bytes
SHA-256: 4c225ab2359b4d10420554eadb1a7019a7c1b0110c59a9a769069e87e5e92660
font_01_sfnt_off00007913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7913 19616 bytes
SHA-256: cf429e2e91354d73b6f0728fc312d6ff4bad20be80a5ba6db32adcb01c969c4a

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