Malicious PDF — malware analysis report

Static analysis result for SHA-256 533f414ddfa6dc15…

MALICIOUS

PDF

34.6 KB Created: 2021-06-20 06:08:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9ed447168d2c106f5adfdb7c8cc778d6 SHA-1: 170179a3d5036ad8463fd7b00f01130e374c54b4 SHA-256: 533f414ddfa6dc15f901b32eb6cdce406e925eef90aa4872ba19c499d200871c
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that lead to websites offering game hacks and cheats, indicating a lure for users seeking such content. The heuristic findings confirm the presence of a link farm and external URIs, strongly suggesting a malicious intent to redirect users to potentially harmful sites. The ML classifier also flagged this PDF as malicious with high confidence.

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-lumber-tycoon-2-fly-hack-game-hack PDF link annotation
    • http://pustaka.ust.ac.id/repository/roblox-zombie-rush-level-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-stuff_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-no-human-veriy_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-roblox-vampire-hunters-2_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-real-life_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-scratchy-youtube-how-to-get-free-games_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/robux-hack-tampermonkey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hack-revealed-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hack-script-pack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/guess-that-song-cheat-sheet-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-free-robux-generator_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_off00002f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F27 22312 bytes
SHA-256: 55575ae11e349464b49f8f81695e97da4f91251398f84f17fd99b5cc4869768e
font_01_sfnt_off000060f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F0 19524 bytes
SHA-256: ee60c46ad4b5d505dac0c4656bf25442ff2bf4e6c2f4c883724093a23b70548b

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