Malicious PDF — malware analysis report

Static analysis result for SHA-256 220d61cbb0c33ba5…

MALICIOUS

PDF

53.2 KB Created: 2021-06-08 21:06:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1be29a362fa309da7242f60a2167c186 SHA-1: 58766563dbbbfc6c8c4c30c2aa12b26b04ecf5c2 SHA-256: 220d61cbb0c33ba527958e70bc360f4d914f723543faa7fedc43efee78a75cef
102 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to websites offering game-related cheats and currency. The ML classifier and the 'PDF_SEO_LINK_FARM' heuristic indicate a high likelihood of malicious intent, likely to drive traffic to sites that distribute malware or engage in phishing. The presence of a 'download button' lure further supports this. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9616

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/all-code-free-2021-roblox-gems-murderer-mystery-2-game-hack PDF link annotation
    • https://shimony.net/images/whats-the-best-free-roblox-exploit_GM431946152.pdfIn PDF document text
    • https://shimony.net/images/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • https://shimony.net/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://shimony.net/images/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/how-to-get-tiktok-famous-for-free_GM835599320.pdfIn PDF document text
    • https://shimony.net/images/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • https://shimony.net/images/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/free-spin-link_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://shimony.net/images/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • https://shimony.net/images/give-free-robux_GM431946152.pdfIn PDF document text
    • https://shimony.net/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://shimony.net/images/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://shimony.net/images/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn 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
stream_004_off00005232.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5232 26604 bytes
SHA-256: 9f87372668bcf207f6259003b130b352abfff7e6885f05077518d0bcd80cb6fc
font_01_sfnt_off00008f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3E 8132 bytes
SHA-256: e6d68e720ea5acf9dccbf7ffde18db6f65c62a99ab7725aa43e30329033a7787
font_02_sfnt_off0000aa2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA2A 19404 bytes
SHA-256: d0924157d683d24fa8a7f2b2f115ef34b01bb796c0031e89350807498965e586

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