Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffc02fa00d7acda…

MALICIOUS

PDF

48.7 KB Created: 2021-06-09 03:45:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6734c9811a3d4bc514fb64b269fc6a6d SHA-1: a4051523ccac72f179bf30667198c5d572af1536 SHA-256: 7ffc02fa00d7acda3673f69463892df28f1a071c422430345fabffede6b64a60
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which are structured as a link farm for SEO purposes, all related to game exploits and cheats. The ML classifier strongly indicated maliciousness, and the presence of external URIs and a 'download button' lure suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious workflow, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/how-to-hack-robux-from-roblox-game-hack
    • https://ozkara.be/wp-content/uploads/fsqm-files/robux-generator-free-no-password_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/oomg-how-to-hack-jeailbreak-on-roblox-with-proof_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/tags-de-hacks-de-roblox_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-promo-codes-in-roblox-2021_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-spin-coin-master-2021-link_GM406889139.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-robux-codes-2021_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-coins-and-spins-coin-master_GM406889139.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-robux-2021-october_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-likes-for-tiktok_GM835599320.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/you-to-get-free-robux-no-hack_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-ways-to-record-roblox-with-voice_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-roblox-c4d-lightroom_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/where-to-get-free-robux_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/tiktok-followers-for-free_GM835599320.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/how-to-hack-roblox-ac-counts_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-a-group_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/dayz-2-roblox-hack_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/mad-city-roblox-cheats_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054ee.bin
137f6c396a8822cb9657a1edad115f3596ac1258599b1fee6e07cbc250c65ef7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54EE 25352 bytes
font_01_sfnt_off00009038.bin
a66b570a908761b39e6d9e18bcb667c353840a86c6a7db528f79d01abe6b23a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9038 2844 bytes
font_02_sfnt_off000099df.bin
e470e47c76e328b8df843ff4726fd00ebc309fad0f3338c5d0086e3c1c62e7f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99DF 18912 bytes

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