Malicious PDF — malware analysis report

Static analysis result for SHA-256 670c07a5bdba0c8d…

MALICIOUS

PDF

44.8 KB Created: 2021-06-04 03:00:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 261a43787e20d482b06c2e8c4c6e79f1 SHA-1: 0d2968f7491966a657cec7c13cb5da0c35808ed5 SHA-256: 670c07a5bdba0c8d0789fd3c85645820158df5761fd1911ad95a080190970a86
102 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources related to game hacks and free currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly flags this PDF as malicious. The presence of a 'download button' lure further suggests a deceptive intent, likely to lead users to scam sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-free-box-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/se-puede-hackear-coin-master_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
stream_004_off0000533f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x533F 25028 bytes
SHA-256: 2ddea434a15d39f87043e4c339fa2876b6720d113eb6b47051eafe0db62dcb71
font_01_sfnt_off00008cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF7 18136 bytes
SHA-256: 5014548489084bc1526755bbac0a98ccda01ba1b83bc85692c033af51eabd5d8

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