Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ebf21d2f1d6455…

MALICIOUS

PDF

41.7 KB Created: 2021-05-19 05:34:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9198c181663d8411cd36814f55385463 SHA-1: e15b9aa8a65412594ada73ab054b8aab060dc14f SHA-256: d8ebf21d2f1d6455f778c5fdace66546fa0e42d61e0c3878b85e3452e9de3598
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that form a link farm, predominantly advertising game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a "download button" heuristic further supports a lure-based attack. The primary goal appears to be directing users to external sites that likely host further malicious content or exploits.

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-pe-free-ios-game-hack
    • http://homequeen.de/images/hack-coin-master-online-without-human-verification_GM406889139.pdf
    • http://homequeen.de/images/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://homequeen.de/images/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://homequeen.de/images/how-to-hack-coin-master-with-game-guardian_GM406889139.pdf
    • http://homequeen.de/images/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://homequeen.de/images/coin-master-hack-https-coinms-net_GM406889139.pdf
    • http://homequeen.de/images/free-robux-no-password_GM431946152.pdf
    • http://homequeen.de/images/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://homequeen.de/images/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • http://homequeen.de/images/how-to-hack-roblox_GM431946152.pdf
    • http://homequeen.de/images/coin-master-free-spins-no-verification_GM406889139.pdf
    • http://homequeen.de/images/coin-master-hack-app-link_GM406889139.pdf
    • http://homequeen.de/images/free-robux-survey_GM431946152.pdf
    • http://homequeen.de/images/what-are-points-for-in-roblox_GM431946152.pdf
    • http://homequeen.de/images/free-minecraft-windows-10-with-java_GM479516143.pdf
    • http://homequeen.de/images/hack-a-game_GM431946152.pdf
    • http://homequeen.de/images/robux-hack-2021_GM431946152.pdf
    • http://homequeen.de/images/free-robux-that-actually-works_GM431946152.pdf
    • http://homequeen.de/images/coin-master-cards-hack-2021_GM406889139.pdf
    • http://homequeen.de/images/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004969.bin
149ff4f9a0958424c547f27ce912e7c90716f7faf30cce05528f421c56950152
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4969 24900 bytes
font_01_sfnt_off000081fa.bin
9df2ada10360c1ec44bdaa5c5cca5c0d6bee254865ff2f5281c544f8bee3309a
pdf-font-stream PDF embedded font (sfnt) at offset 0x81FA 17864 bytes