Malicious PDF — malware analysis report

Static analysis result for SHA-256 7faf5ef85f8e21c7…

MALICIOUS

PDF

39.1 KB Created: 2021-05-21 23:37:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f1b679db867083c6cea926ce14a8f2c8 SHA-1: 8107e406ce58ec9d61b4201b63561b9aae938f4d SHA-256: 7faf5ef85f8e21c7941da70cc150ee24fa4e57d1c7a79e834bb7acfb0b8785a8
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document employs social engineering tactics, specifically a 'ClickFix' lure, to trick users into executing commands or visiting malicious URLs. The document body and heuristics indicate a focus on 'game hacks' and 'free generators' to entice users. The embedded URLs point to sites that host further malicious PDFs or potentially download second-stage payloads, suggesting a downloader or redirector functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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-start-a-minecraft-server-for-free-game-hack PDF link annotation
    • http://julo-it.net/images/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://julo-it.net/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://julo-it.net/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://julo-it.net/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://julo-it.net/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35FA 24548 bytes
SHA-256: 2567b15a3db4b78a9bedf9e28d6ea41487ad636db7dd1072fb7100fdc4f6255f
font_01_sfnt_off00006de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE7 3128 bytes
SHA-256: 801f6fa60decd1add2f223f91580103c35e150c924465f86a7a572b3e00674f9
font_02_sfnt_off00007827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7827 17988 bytes
SHA-256: 4f50b9796c9c5e6e2841d90a47ce680cd3d0047611852497406c2f0c8cfa935a

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