Malicious PDF — malware analysis report

Static analysis result for SHA-256 e529341fc400bf0b…

MALICIOUS

PDF

44.7 KB Created: 2021-05-12 22:06:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 95161823b6e348b78ba02b6e8bfd88c6 SHA-1: d2dfb7d17d11346f4d9cbf8ee52f6cd1471929f6 SHA-256: e529341fc400bf0b0ca110ce77920419da14119dc2e2dff409d634a484c6fe2e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which are SEO-optimized and point to game hack-related content, indicating a link farm designed to attract users. The presence of a 'download button' heuristic further suggests a lure to download potentially malicious files. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/how-to-get-minecraft-for-free-on-android-device-game-hack
    • http://reisebild.eu/images/coin-master-hack-apk-online_GM406889139.pdf
    • http://reisebild.eu/images/how-to-get-free-robux-hack_GM431946152.pdf
    • http://reisebild.eu/images/coin-master-free-spin-ml_GM406889139.pdf
    • http://reisebild.eu/images/robux-hacks-2021_GM431946152.pdf
    • http://reisebild.eu/images/coin-master-hack-tool-2021_GM406889139.pdf
    • http://reisebild.eu/images/free-pet-food-on-coin-master_GM406889139.pdf
    • http://reisebild.eu/images/roblox-hack-2021_GM431946152.pdf
    • http://reisebild.eu/images/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdf
    • http://reisebild.eu/images/hacking-apps-for-roblox_GM431946152.pdf
    • http://reisebild.eu/images/robloxfun-com-robux_GM431946152.pdf
    • http://reisebild.eu/images/online-coin-master-hack-here_GM406889139.pdf
    • http://reisebild.eu/images/coin-master-daily-free-spins_GM406889139.pdf
    • http://reisebild.eu/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://reisebild.eu/images/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://reisebild.eu/images/get-free-robux-without-human-verification_GM431946152.pdf
    • http://reisebild.eu/images/how-to-get-free-spins-grom-coin-master_GM406889139.pdf
    • http://reisebild.eu/images/free-spins-and-coins-coin-master_GM406889139.pdf
    • http://reisebild.eu/images/how-do-we-get-free-robux_GM431946152.pdf
    • http://reisebild.eu/images/hack-coin-master-apk-mod_GM406889139.pdf
    • http://reisebild.eu/images/free-robux-real-working_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049e9.bin
9b1fb3ce16693f62035fd33100925a6a1ead4a72d7cd3aa07909b289bf17c14e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E9 30172 bytes
font_01_sfnt_off00008c69.bin
f1b1885292fe7804ab1139a421bc8971dcdb5c33ccbea204e48355468ca4790a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C69 18332 bytes

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