Malicious PDF — malware analysis report

Static analysis result for SHA-256 05bcb6c8a1ed7143…

MALICIOUS

PDF

46.6 KB Created: 2021-05-18 01:04:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 20151f0a6b3e36257552a2d48857ea67 SHA-1: 62678c5328d6cee321cdee628538c06eecd02db3 SHA-256: 05bcb6c8a1ed71438bb1635cecdf0e9a81d24d24cc025c98c2454e6f91d3657d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as PDF files, suggesting a link farm designed to distribute malware. The document body and extracted URLs indicate a lure related to game hacks and cheats, aiming to trick users into downloading malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-free-education-game-hack
    • http://auto-mankel.de/images/free-roblox-hack_GM431946152.pdf
    • http://auto-mankel.de/images/coin-master-hack-app-android-download_GM406889139.pdf
    • http://auto-mankel.de/images/roblox-free-robux_GM431946152.pdf
    • http://auto-mankel.de/images/free-spins-coin-master-no-survey_GM406889139.pdf
    • http://auto-mankel.de/images/free-robux-pins_GM431946152.pdf
    • http://auto-mankel.de/images/free-unlimited-coin-master-400-spin-link_GM406889139.pdf
    • http://auto-mankel.de/images/hack-coin-master-apk-33_GM406889139.pdf
    • http://auto-mankel.de/images/how-to-hack-and-get-free-robux_GM431946152.pdf
    • http://auto-mankel.de/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • http://auto-mankel.de/images/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://auto-mankel.de/images/boost9-com-roblox-hack_GM431946152.pdf
    • http://auto-mankel.de/images/coin-master-free-coins-and-spins_GM406889139.pdf
    • http://auto-mankel.de/images/free-robux-download_GM431946152.pdf
    • http://auto-mankel.de/images/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://auto-mankel.de/images/coin-master-free-spins-for-today_GM406889139.pdf
    • http://auto-mankel.de/images/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdf
    • http://auto-mankel.de/images/coin-master-free-spins-app_GM406889139.pdf
    • http://auto-mankel.de/images/coin-master-spin-hack-link_GM406889139.pdf
    • http://auto-mankel.de/images/free-daily-spins-from-coin-master_GM406889139.pdf
    • http://auto-mankel.de/images/how-to-get-free-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004821.bin
96110d08313930007ca24b81d7dbddbb08558c2a0099fd478d0751727f24990c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4821 29040 bytes
font_01_sfnt_off000089d0.bin
3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x89D0 3092 bytes
font_02_sfnt_off0000947a.bin
bf17ed4b0ebdd3b4eae97da45cdc9952f927a0ef0c6480354077e4570e8b9627
pdf-font-stream PDF embedded font (sfnt) at offset 0x947A 18024 bytes