Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba01630864f3848…

MALICIOUS

PDF

35.3 KB Created: 2021-06-25 09:24:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2e38172680bce398e9be29bd56513e1f SHA-1: 8c960075e67e0ac457b1959c47d44cece983bd84 SHA-256: 5ba01630864f384860ab11a1af1e359e8c6415e599bdbbbbe814a6b97851ec2e
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which are structured as SEO-optimized PDF links, suggesting a link farm or content aggregation tactic. The document body and extracted URLs indicate a lure for free in-game currency or hacks for popular games like Roblox and Coin Master. The presence of a download button lure and the ML classifier's high confidence score further support the 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/top-5-games-on-roblox-that-gives-me-free-robux-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-jailbreak-hack-no-virus_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-25-000-robux-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/classic-noob-roblox-t-shir-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/newo-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-roblox-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-views-on-tiktok_GM835599320.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_off00003008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3008 22496 bytes
SHA-256: 3fac08e02723c202d5f43d86152d17d443649bba15244afa6598ef6d9366bbd6
font_01_sfnt_off0000621f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621F 20060 bytes
SHA-256: e9cf63d986c4af307555759768f194645a9903330a221ab4a048d8bc089dab26

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