Malicious PDF — malware analysis report

Static analysis result for SHA-256 a380375baca9c604…

MALICIOUS

PDF

45.8 KB Created: 2021-06-09 08:59:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 796b014638badf4833d0980cc69a0e83 SHA-1: 8bd25fe4c2c80e324b7c4b11648d0a213ee48255 SHA-256: a380375baca9c6046bfa692048fe9e0c3829cc17e8263fb4faf955f1ffd8c48a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized links for game cheats and hacks. The ML classifier and PDF link farm heuristics strongly indicate malicious intent, likely to redirect users to sites that host malware or phishing content. The presence of embedded URLs and the document's structure suggest a tactic to drive traffic to potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-money-in-jailbreak-roblox-game-hack PDF link annotation
    • http://io24.com.ar/images/farmtown-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-card-codes-not-expired-2021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/robux-pastebin-hack-no-waiting_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-hack-roblox-with-cheat-engine-63_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/is-pokemon-go-fest-free_GM1094591345.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-without-downloading-apps_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
stream_004_off00005432.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5432 25104 bytes
SHA-256: bc6f1408b164efc49827ad58723e35aab56f356f9341eb8bffd1afd877f7bddf
font_01_sfnt_off00008e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E87 19008 bytes
SHA-256: eaa4f7dc685b3064514aec3dc655e3e8376fc85f5a72189c905e78f30ac5b784

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