Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd879cd7e3960df…

MALICIOUS

PDF

43.3 KB Created: 2021-05-17 00:49:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 34fad48db6e6a1b91f8cf0aaeb357864 SHA-1: bb11a9a3c607f1fbf3b9347b2252bed3ef775819 SHA-256: 7bd879cd7e3960df79fc887ef4e0f63a5b92cc00bddfaf7682ff4ed4dd672116
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, including one pointing to 'netcdn.xyz', which is associated with downloading game-related content. The presence of a 'download button' heuristic and the ML classifier's high confidence score suggest a malicious intent to trick users into downloading further payloads. Although no scripts were explicitly extracted, the document's structure and embedded links indicate a lure for potentially unwanted or malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/free-minecraft-server-hosting-with-plugins-game-hack
    • https://www.linzgau-kjh.de/images/free-roblox-wings_GM431946152.pdf
    • https://www.linzgau-kjh.de/images/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdf
    • https://www.linzgau-kjh.de/images/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • https://www.linzgau-kjh.de/images/coin-master-hack-reddit_GM406889139.pdf
    • https://www.linzgau-kjh.de/images/how-to-get-minecraft-for-free_GM479516143.pdf
    • https://www.linzgau-kjh.de/images/free-robux-without-downloading-apps_GM431946152.pdf
    • https://www.linzgau-kjh.de/images/can-you-give-me-robux_GM431946152.pdf
    • https://www.linzgau-kjh.de/images/coin-master-freebies_GM406889139.pdf
    • https://www.linzgau-kjh.de/images/coin-master-free_GM406889139.pdf
    • https://www.linzgau-kjh.de/images/rewards-robux_GM431946152.pdf
    • https://www.linzgau-kjh.de/images/free-coins-and-free-spins-coin-master-2021_GM406889139.pdf
    • https://www.linzgau-kjh.de/images/how-to-make-free-robux_GM431946152.pdf
    • https://www.linzgau-kjh.de/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • https://www.linzgau-kjh.de/images/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • https://www.linzgau-kjh.de/images/free-roblox-hack-us_GM431946152.pdf
    • https://www.linzgau-kjh.de/images/coin-master-free-coin-and-spin-app_GM406889139.pdf
    • https://www.linzgau-kjh.de/images/coin-master-hack-apk_GM406889139.pdf
    • https://www.linzgau-kjh.de/images/blogger-free-spins-and-coins_GM406889139.pdf
    • https://www.linzgau-kjh.de/images/coin-master-heaven-links_GM406889139.pdf
    • https://www.linzgau-kjh.de/images/free-coins-coin-master-blog_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004dc6.bin
6ae29fd7769aa291c7efc845cda224b944e3c6541e07edabf392ff6e6917698b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DC6 24540 bytes
font_01_sfnt_off00008554.bin
acfaf3ec89f3d6287f10dcf224a7b6ca2fa14913dee94becfc4eecdab87a7a6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8554 18844 bytes