Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a69301ccbad6d5…

MALICIOUS

PDF

47.5 KB Created: 2021-06-09 06:52:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bd275535cd70537da37bf4375d7a4b14 SHA-1: 8e841d9442387697681cccf7a8d164a57d16cd77 SHA-256: 68a69301ccbad6d5ead472b72295e849ee86d1dd56b1f10a5ae5b7ab7d882a0d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF gateways for game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic further supports a malicious intent to trick users into downloading further content. The document body itself contains obfuscated text and URLs related to game exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/roblox-jailbreak-free-hack-2021-game-hack PDF link annotation
    • http://io24.com.ar/images/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/rbx-website_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-actually-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-high-school-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/cm-spins_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://www.bandicam.comIn 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
font_00_sfnt_off0000500d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x500D 25580 bytes
SHA-256: a2b5e7d2143e6e2845ee19f02c34364ea5d05d7f9aab797c04fd0e3ec2ee7548
font_01_sfnt_off00008a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8E 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off0000948a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x948A 19036 bytes
SHA-256: 6ec50b37d919f9f966270bad59fd79c3cc355df0966ce8b9c28d1bd8437f77f9

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