Malicious PDF — malware analysis report

Static analysis result for SHA-256 9828866ad2c842aa…

MALICIOUS

PDF

42.1 KB Created: 2021-05-14 22:17:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 57925a20bd39fd17d10169056f8c1850 SHA-1: c0c1789066ef88ab6501e67e337e1888d4d0babc SHA-256: 9828866ad2c842aad0f1c363ebf1a24b2177ce0fc6c17788a86300e7ce048344
82 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/robuxmatch.com-free-robux-game-hack.
  • 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/431946152/robuxmatch.com-free-robux-game-hack PDF link annotation
    • http://krumerhaus.at/images/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/114-hacks_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-app_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000467e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x467E 25264 bytes
SHA-256: 069c03d3407e8334f764e6d98366e6907bb2f977c4092ff9c3cc1fa822baec4b
font_01_sfnt_off000080a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A0 18840 bytes
SHA-256: 5c4f625c96edef5f8da70d27324c4adb1887d0c0038b5237fb9b16f25e0c59c0

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