Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e219a1d7cc8296d…

MALICIOUS

PDF

47.1 KB Created: 2021-06-02 05:44:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 83ad7b3e097e6f6bd90ba0ff392544ea SHA-1: 2db66e93630823fbb6a1bae3d188cdfc18ce29ba SHA-256: 2e219a1d7cc8296d63780c6a0184932a4c830443d893adbba86d4392e51321ed
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, suggesting an attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ML classifier flagged the PDF as malicious. The document body, though partially corrupted, contains a URL that aligns with the lure of free college textbooks and game hacks, indicating a phishing or malware distribution attempt.

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.xyz/app/835599320/free-college-textbooks-tiktok-game-hack PDF link annotation
    • http://j-cook.pro/images/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://j-cook.pro/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/how-to-get-minecraft-pe-for-free_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E5F 27176 bytes
SHA-256: e8daebb3e886f7ace1c24a40c33d422e766a49d96127cee7cf167dabba9fa2cc
font_01_sfnt_off00008bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD2 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off000095b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B8 18184 bytes
SHA-256: c51aa8ed87b8ee8755a1ecd789814fb67703fc10c946440f5ae6e88abb0f8eda

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