Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f638a094c6280e1…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 01:43:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3627a871910491e58a38526fa7ce1247 SHA-1: 8d49047f7d92a51ef62692f9104e0bf5dd52b060 SHA-256: 6f638a094c6280e185800cb4d13d76ef56a92f75004b6b48bfa8b46b95496734
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a 'download button' lure, strongly suggesting a phishing or malware distribution attempt. The document body and extracted URLs promote free Robux and game hacks, indicating a social engineering tactic to entice users to click malicious links. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/free-robux-no-verification-needed-game-hack
    • https://repository.stikesindramayu.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-generator-for-kids_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-hack-mod-apk-35-8_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/websites-that-give-free-robux_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-coin-master-hacks-no-verification_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/sites-to-get-free-robux_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/level-coin_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-bonus_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/master-coin-master-free-spin_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-site_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/rewards-roblox-com_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-download-for-pc_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-giveaway-live_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-card-link-today_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/minecraft-realms-free_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-online-games-like-minecraft_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a79.bin
8ec612057568d8f31c0fa05a45f07918812a6f01e37ce0aaa7b6f2069b47600e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A79 24772 bytes
font_01_sfnt_off0000837f.bin
d142001b9e8124b93d34dd5eb493ac1502906b177ba9fa7077e4038994baf40d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x837F 18776 bytes

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