Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6fa27b7d1271d91…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 16:15:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bc0f18fe1f585dda1409f5fa7870ec81 SHA-1: 5491d4957f16fd297067bf6a3188fc11b08308af SHA-256: e6fa27b7d1271d9142673cd07204c5fffb465e48a38e654a5f8fcfdd456ef75d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which appear to be SEO spam related to games and hacks. The ML classifier flagged this PDF as malicious with high confidence. The document body and extracted URLs suggest a lure to click on these links, potentially leading to malware downloads or phishing sites.

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.co/app/431946152/how-to-hack-shinobi-life-roblox-game-hack PDF link annotation
    • https://repository.stikesindramayu.ac.id/repository/roblox-colouring-in-pages-free_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-hack-roblox-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-promocodes-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/hacks-for-sale-in-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/border-games-with-free-groups-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-pe_GM479516143.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/juego-hackeado-de-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/turtle-roblox-hack_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-phone-number-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-robux-in-roblox-not-cheating_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-free-cape-catalog_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-com-hack_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
font_00_sfnt_off0000306f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306F 22312 bytes
SHA-256: fb2d451ae4648c5648d4f14f293dd96b2a9fd24f691ab0b1dab4a151d3a76095
font_01_sfnt_off000061d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D6 19104 bytes
SHA-256: 4207e1ff09300543137e2c347008e2a6565192aa81cd6e30a150b5c15797160e

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