Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e02db6c0f2d2cb…

MALICIOUS

PDF

44.0 KB Created: 2021-05-15 14:36:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: eb7aab2a13b63bcba7f792823d25c545 SHA-1: d61d35953227c0c8421d322d902edb215239f073 SHA-256: 86e02db6c0f2d2cb08621298c85d1c91e883f1e9086b851efcc7ed4b10e9078f
122 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to other PDF files, suggesting a link farm or SEO spam campaign. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download button' lure and a callback lure further supports a malicious intent, likely to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • 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/406889139/coin-master-spin-link-hack-game-hack
    • http://iacfhouston.com/images/get-free-robux-today_GM431946152.pdf
    • http://iacfhouston.com/images/how-to-get-free-spins-in-coin-master_GM406889139.pdf
    • http://iacfhouston.com/images/free-spins-on-coin-master-hack_GM406889139.pdf
    • http://iacfhouston.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://iacfhouston.com/images/coin-master-hack-version-download-2021-ios_GM406889139.pdf
    • http://iacfhouston.com/images/complete-offers-for-robux_GM431946152.pdf
    • http://iacfhouston.com/images/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://iacfhouston.com/images/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://iacfhouston.com/images/robux-generator_GM431946152.pdf
    • http://iacfhouston.com/images/coin-master-free-spins-apk-2021_GM406889139.pdf
    • http://iacfhouston.com/images/best-way-to-hack-coin-master_GM406889139.pdf
    • http://iacfhouston.com/images/freerobuxhack-us_GM431946152.pdf
    • http://iacfhouston.com/images/coin-master-daily-free-cards_GM406889139.pdf
    • http://iacfhouston.com/images/minecraft-pe_GM479516143.pdf
    • http://iacfhouston.com/images/free-robux-2021_GM431946152.pdf
    • http://iacfhouston.com/images/avatar-the-last-airbender-roblox_GM431946152.pdf
    • http://iacfhouston.com/images/coin-master-free-spins-2021_GM406889139.pdf
    • http://iacfhouston.com/images/free-spin-coin-master-game_GM406889139.pdf
    • http://iacfhouston.com/images/free-robux-group-payouts_GM431946152.pdf
    • http://iacfhouston.com/images/how-to-make-a-free-minecraft-account_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b9f.bin
b565d6d474099a58c32be987a615c5ddd3483c75455ad43de16aca35c13a8208		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B9F 28140 bytes
font_01_sfnt_off00008b04.bin
c533e9bb75785fd28ad8a213fe77ef0dfd7b5440e23aeac77779c9c975df78ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B04 17892 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.