Malicious PDF — malware analysis report

Static analysis result for SHA-256 0845635075bb3ef5…

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 11:32:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9f9dc78670e2ed22aeb512d04bcbd49c SHA-1: 01efb702c4113c031b30a0a19806bcdd1767967a SHA-256: 0845635075bb3ef522706c362ace41dc0f4d7b7256f8eb8e6a61b46d5b8e5591
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which are structured as PDF files themselves, suggesting a link farm or redirection to malicious content. The document body and extracted URLs explicitly mention game hacks and cheats, indicating a social engineering lure to trick users into downloading or visiting potentially harmful resources. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/roblox-jailbreak-go-through-walls-hack-game-hack PDF link annotation
    • http://anna-art.in.ua/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-robux-wings_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://anna-art.in.ua/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://anna-art.in.ua/images/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/aimbot-download-roblox_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
font_00_sfnt_off00004d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D21 28216 bytes
SHA-256: 8f01b547a3b0d68d91902f1b2a83cb8bb1aa1523cf8eb6e1f855232541d5f235
font_01_sfnt_off00008d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4A 19260 bytes
SHA-256: 8a4fc245635e0d03e6abbe015873c531673879c56c5fd28b1647e454c10b8a59

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