Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2f9600695b35a6…

MALICIOUS

PDF

44.1 KB Created: 2021-05-13 03:30:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bf4307e086f418a89d70329a4169838e SHA-1: c4f32d64a9331411a48824a4689f07b45c776b66 SHA-256: bb2f9600695b35a645121c2684ed857c02f96c33cf9d8ec6f4f736979eb06156
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs and a prominent external URI pointing to sites offering 'free Robux' or similar in-game currency, indicating a lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of numerous links and the document's theme suggest an attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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-verification-2021-game-hack PDF link annotation
    • http://ledtherapysystems.com/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://ledtherapysystems.com/images/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://ledtherapysystems.com/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://ledtherapysystems.com/images/i-robux_GM431946152.pdfIn PDF document text
    • http://ledtherapysystems.com/images/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://ledtherapysystems.com/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://ledtherapysystems.com/images/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ledtherapysystems.com/images/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://ledtherapysystems.com/images/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://ledtherapysystems.com/images/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://ledtherapysystems.com/images/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://ledtherapysystems.com/images/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://ledtherapysystems.com/images/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ledtherapysystems.com/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ledtherapysystems.com/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ledtherapysystems.com/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ledtherapysystems.com/images/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://ledtherapysystems.com/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://ledtherapysystems.com/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://ledtherapysystems.com/images/get-minecraft-for-free_GM479516143.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_003_off00004cd8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CD8 24876 bytes
SHA-256: 340e2e2151cd5a7e1181c66f58ca2736816fa5ab1580313be7d033bd14fa07f1
font_01_sfnt_off00008669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8669 19528 bytes
SHA-256: 1b346556c7df455cb9a54b8f1a6e3f1a0bfffa2d9228fa0640c35d2bdb9db684

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