Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7d1eb37733426b…

MALICIOUS

PDF

34.8 KB Created: 2021-05-21 09:12:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f4bb52ddf45ad0dd293e7023e96aa8f9 SHA-1: 318287666177fe45cdb817052f44455a147ea367 SHA-256: 4a7d1eb37733426b56f4cfb01ab0ec94fab7e826e7aee9f6f41c21b0ed3c1b37
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that promise free TikTok likes or Robux hacks, indicating a lure for potentially malicious content or scams. The presence of a "download button" heuristic and the ML classifier's high confidence score further support a malicious classification. Although no scripts were explicitly extracted, the document's structure and embedded links suggest it's designed to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/835599320/100-free-tiktok-likes-game-hack PDF link annotation
    • https://javisintlmedia.com/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-do-we-get-free-robux_GM431946152.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_002_off0000302b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x302B 24372 bytes
SHA-256: 35e5c516491c6591f96885d6103409bae019b94b3f5adce6e51b20ad059e47b9
font_01_sfnt_off0000684d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x684D 17732 bytes
SHA-256: 1b00865e4acd6ce65da32f05c0e9476b22c6f4a70aecdf287507a02fac06e95e

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