Malicious PDF — malware analysis report

Static analysis result for SHA-256 25508e3adea6ca16…

MALICIOUS

PDF

32.7 KB Created: 2021-06-29 01:45:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7dbe21eeba37fa9f6ed617a0c7694d67 SHA-1: 2648a441cb321939b2786747280c42273540c6c3 SHA-256: 25508e3adea6ca16f3f38dbd5ce2ec8aff01bfc2b265cba9fd294ab059609bf1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a call-to-action phrase, strongly suggesting a lure for users to download potentially malicious content or visit phishing sites. The ML classifier also flagged this PDF as malicious with high confidence. The presence of multiple links related to game hacks and free currency indicates a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • 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.
  • 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.co/app/431946152/cute-animal-outfits-roblox-free-game-hack PDF link annotation
    • http://digilib.unbari.ac.id/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-put-hack-scripts-in-roblox-studio_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-make-ur-own-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/can-you-make-gamepasses-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/is-roblox-getting-hacked-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-on-an-xbox-on_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-earn_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/get-coin-master-cards-free_GM406889139.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
font_00_sfnt_off00002a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A2D 21896 bytes
SHA-256: aeae0a130cc4d5dd1dc0245ed123b125b48ba8f71e53eb17f506b6798d4f62d1
font_01_sfnt_off00005a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6E 19276 bytes
SHA-256: f5d8ada8af9c9221c539101b8227f4a5fce697ed6695b85e9874492c6dc599b2

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