Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c32d5459306feba…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 18:01:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5fa5de967737ede8f8ef2f7964e4994f SHA-1: 6534a0bc2c1fef2cca27c4cc8c6031fc5ab6a576 SHA-256: 3c32d5459306febafec4d8923c0e51f721cd5285cecbee89875742201d9c3257
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages promising free in-game currency or hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs suggests an attempt to redirect users to potentially harmful websites. The document's content and structure indicate a lure for users seeking exploits or cheats, likely leading to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/how-to-get-free-robux-hack-on-android-game-hack PDF link annotation
    • http://lib.kunci.or.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-2021-nove-ber_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/300m-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-ro-ghoul-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-rocket-fuel-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hacking-app-for-hacking-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-2021-no-having-to-get-anything_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/go-thru-walls-roblox-jailbreak-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-without-verification-on-ios_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-free-spins-on-coin-master-2021_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_off00002ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED5 22588 bytes
SHA-256: 2793fcee5e60992e8d2c5fd49d98634c64f145bbf98f8c7a1baf1e46f60b12c4
font_01_sfnt_off00006183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6183 19448 bytes
SHA-256: 27463cbf8f173e73e64a1a825be7a441dbae39ae4108aca1fe6763979c4a2da3

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