Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db7fa7eb818b91f…

MALICIOUS

PDF

35.3 KB Created: 2021-05-23 07:51:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 19ebcf770a9a62e7a4a2fb8ceca2b6ae SHA-1: 6f02eabf1fe981e64053aa3744e7225a917e0e61 SHA-256: 8db7fa7eb818b91ff4f15633bac99410e387367e879ef2b34e554bdfa82af762
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and lures users with a 'TikTok For Free' generator, indicating a phishing or malware distribution attempt. The heuristic 'SE_BROWSER_INSTALL_LURE' further suggests the document aims to trick users into installing unwanted software or extensions. The presence of multiple suspicious URLs points to a distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/tiktok-for-free-game-hack PDF link annotation
    • http://www.adravietnam.org/images/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-to-get-free-airpods-tiktok_GM835599320.pdfIn PDF document text
    • http://www.adravietnam.org/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/robux-com-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_off0000313b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x313B 25548 bytes
SHA-256: a07feec69209bd32bcb7b748b18e35e18ae92f92155959694acaf2c4aeacc2b8
font_01_sfnt_off00006b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4B 17456 bytes
SHA-256: 59b82efa7141ba2b07d91e3b641cbf682cee4575ed292f5ecf89ba3b7e2e2e13

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