Malicious PDF — malware analysis report

Static analysis result for SHA-256 4393f8c70c3e852c…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 01:35:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a943c6bdf2e001d9685297e4e93f03f1 SHA-1: 3c7b18f5a85c3679ffebb46cb16b5b6a2c9c34b9 SHA-256: 4393f8c70c3e852c36dc6f63c0fbca073fce432f85cb59458e458c6535c22e4f
62 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are related to game hacks and cheats, suggesting a lure for users to download or visit malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and callback lures further supports a malicious intent. The document's content and structure are consistent with phishing or scam attempts designed to trick users into clicking on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-and-coins-blogspot-game-hack PDF link annotation
    • http://mtsn-baranti.com/perpus/repository/how-to-customize-your-roblox-character-for-free_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/i-want-free-robux-visit-this-site-www-roblox-us_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-superhero-body-in-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-hacks-with-windows-8_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/filtered-roblox-hack_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-for-windows_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/robux-cheats-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-robux-for-free-on-pc-without-downloading_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_off000031fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31FA 22712 bytes
SHA-256: bd90763886cc5aff117d8818c41b41471daa00199ef3eb9406a08715a6d54423
font_01_sfnt_off000064a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A3 18636 bytes
SHA-256: 77a53ca9a0da76c6fec701e0feff9ca620a686d010f30580b8dc7f9926b66f2b

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