Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a855bd3a292c8b…

MALICIOUS

PDF

34.7 KB Created: 2021-07-01 06:52:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d439fd62d16388f81107eccbdd621c18 SHA-1: bb3532b55456b51c46ad429ad2496d3349d78934 SHA-256: 95a855bd3a292c8bbc72dd0c0f23e0294e3e61a10c87c71cf4fbbad408c2e2a3
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are structured as SEO-optimized PDF links, suggesting a link farm or content-scraping operation. The document body and extracted URLs promote free software, game hacks, and cheats for popular games like Roblox and Coin Master, indicating a lure for potentially malicious downloads or scam websites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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/free-3d-modeling-software-for-roblox-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/get-free-robux-without-any-identification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-jailbreak-how-to-get-bugatti-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/pokemon-go-free-hack-apk_GM1094591345.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-cheats-to-get-2021-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/6x6x6-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-code-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-bots-to-join-a-group-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-become-the-hockey-mask-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-items-in-the-catalog-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-in-roblox-prison-life-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-high-school-2-hacks_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-block-piece-roblox-autofarm_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-gift-card-codes-november-2021_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_off00003035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3035 22020 bytes
SHA-256: c268061b420ac3395b06b45fa63a384cec3eed5be18c6d9727165422d6409fd1
font_01_sfnt_off000060e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E5 19584 bytes
SHA-256: 588d649401c34d6d6f0ec21ed4a97944282c68793b5dfdbe6eafe1da91e0d152

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