Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2599a9bc34cb0b…

MALICIOUS

PDF

34.0 KB Created: 2021-06-18 06:15:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7fab43ab1d5127867bed8408c108b43e SHA-1: b861e320b3caaf895e1a76b1ed545dac4904eb5a SHA-256: 1f2599a9bc34cb0baea0a65eded5020cbe07b857c07877c3c68ac2c1c4d20000
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on domains associated with SEO link farms. The document body and extracted URLs suggest a lure for game cheats and hacks, indicating a phishing or malware distribution attempt. 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/roblox-hack-music-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/how-to-get-roblox-free-builders-club_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/likes-for-tiktok-free_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/cheat-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-cheat-in-roblox-jailbreak-speed-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/latest-coin-master-free-spins-link_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_off00002f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F63 21896 bytes
SHA-256: ec9f783f5b2e50a56492dc6da2c02f597130a9ba22e01fc60b11354b4f8e3670
font_01_sfnt_off00005fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDD 19112 bytes
SHA-256: ac8a87d02eef9051b73729b474f259650bacd08021c5f4c3d093d959b5fed2da

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