Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a09b29abb352993…

MALICIOUS

PDF

41.5 KB Created: 2021-05-16 14:42:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c8153a99989370cecf93be6bc14fd678 SHA-1: 8bc19ac0cb652376187ad197d6d0024857732d8f SHA-256: 8a09b29abb352993f7e8f9159b5038a085841e4cc5ce4a0059cf4618235a716c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which are structured as SEO-optimized URLs pointing to sites offering game hacks and free currency. The ML classifier strongly indicated maliciousness, and the presence of a "download button" heuristic further supports a malicious workflow. The document's content and structure suggest it is designed to trick users into visiting these links, likely leading to malware downloads or phishing pages.

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/479516143/minecraft-xbox-free-game-hack PDF link annotation
    • http://apd-ukraine.de/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/robux-game-com_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://apd-ukraine.de/images/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://apd-ukraine.de/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/coin-master-free-spin-codes_GM406889139.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_off0000483b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x483B 24812 bytes
SHA-256: 3bf1e78e51e917394ea2bfaea94f2a52a634fede6587ffe2abe15cb70ebe34a0
font_01_sfnt_off00007feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEB 18304 bytes
SHA-256: b19b3ee426dc01289f0e43c477ac2043c2327265a5c21cc50be6a14b80435fcf

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