Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bcdb472dee81c6…

MALICIOUS

PDF

41.2 KB Created: 2021-05-16 03:23:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d5bc8f8e19ded77430d83be86914827b SHA-1: 54674bedab4c64576f511a72774a1f5995afabae SHA-256: 14bcdb472dee81c69541747c3f23fbadfb8e3a539d9a38fa4f4942bfd5d0af86
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm designed to attract users with promises of game hacks and cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' heuristic further supports a malicious intent to trick users into downloading further content. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/master-coin-hack-game-game-hack PDF link annotation
    • http://adues.org/images/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://adues.org/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://adues.org/images/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://adues.org/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://adues.org/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://adues.org/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://adues.org/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://adues.org/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://adues.org/images/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://adues.org/images/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://adues.org/images/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://adues.org/images/2021-roblox_GM431946152.pdfIn PDF document text
    • http://adues.org/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://adues.org/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://adues.org/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://adues.org/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://adues.org/images/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://adues.org/images/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://adues.org/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://adues.org/images/free-robux-generator-no-verification_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_003_off0000470e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x470E 25016 bytes
SHA-256: e24da54f0c62ade1a190023c49aa93d6f7d64c6a36d79ffca0f2d2a637fb51a4
font_01_sfnt_off00007f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7B 17976 bytes
SHA-256: 61a7e5df1615dd2bed66e1a1700862b148b1481b00ec863c05290e253e9efb54

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