Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c2034dca98bcaa…

MALICIOUS

PDF

44.2 KB Created: 2021-06-14 01:48:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 82d2caa81495b16a94ea6fccbaa06ea9 SHA-1: 7b1bd581ba79462da9a247e8695297385d6978b8 SHA-256: 30c2034dca98bcaa728d79b94bbd3f6b31d2c2829a4bea2d583dfc9d5b53af1e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, primarily promoting free Robux and game hacks. The presence of a direct download URL and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/husky-free-robux-game-hack PDF link annotation
    • http://pustaka.fti.unand.ac.id/repository/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-roblox-gift-card-20219_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-rblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/114-4-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/slaying-simulator-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DA 24488 bytes
SHA-256: 189090770fa9c203f2734003a8ec01b58ca976bc26867d62682ab323d823e8a1
font_01_sfnt_off00007f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F74 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8925 18552 bytes
SHA-256: decc0d2fbb458eda50bd7f603a9fe89858be36f833727609d51901a8e3eeaa63

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