Malicious PDF — malware analysis report

Static analysis result for SHA-256 3825497f00d955b5…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 13:48:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 31bf1b9636b22fc8e4f2ef18b59f2a63 SHA-1: 15351a29615db4480aff7e8d0038a93239f1a41c SHA-256: 3825497f00d955b585339885eafad8cba3136fba8f667155377b162ac432749c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes free Robux and game hacks, indicating a phishing or scam attempt. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of links were generated, likely to attract users through search engines. While no scripts were explicitly extracted, the presence of external URIs and the ML classification strongly suggest malicious intent, likely to lead users to download malware or engage in credential harvesting.

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.tw/app/431946152/how-to-get-800-robux-for-free-game-hack PDF link annotation
    • https://cogp.greentrade.org.tw/image/data/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/blox-best-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-whatsapp-tik-tok-status-download_GM835599320.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/oprewards-login_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-free-robux-just-by-2-steps_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-transfer-robux-to-another-account-free_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-hacking-simulator_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F78 22676 bytes
SHA-256: 04a1954ea36e244bbd9c7648b5ca6ac3df8fe9267d3cf422954e8f1753c1c290
font_01_sfnt_off000061e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E7 19368 bytes
SHA-256: be805ca657918939693b450b7256d01abf85ed37ddec4e2d86a9c4404475f57d

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