Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93a2d89d69e25df…

MALICIOUS

PDF

45.3 KB Created: 2021-05-13 02:31:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 78365bd156e5043637694966785a8343 SHA-1: 15c04db7115f3f0721f50fda0453c65fadf80382 SHA-256: a93a2d89d69e25df32e8234924ec2c14cd3ba3c8c0fa559efe7f4dcca9ecf12d
82 Risk Score

Malware Insights

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

The PDF document impersonates Microsoft and uses a lure related to free Minecraft games to trick users into clicking a malicious link. The primary malicious URL identified is https://netcdn.xyz/app/479516143/free-minecraft-games-for-kids-game-hack, which is likely intended to lead to a malware download or phishing page. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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/479516143/free-minecraft-games-for-kids-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/479516143/free-minecraft-games-for-kids-game-hack PDF link annotation
    • http://bw.ac.th/userfiles/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/woman-roblox_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://freegiftcodes.euIn 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
stream_003_off00004baa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BAA 25376 bytes
SHA-256: ce8ff7ba905f25147b61089ac4f1d5fab33510179ade898f7298226cfff630f4
font_01_sfnt_off0000854f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x854F 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off00008f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0E 18144 bytes
SHA-256: 13e7e5cd67c7f2718453187682e852ca38f83a1f5fffd311a8da849f95858a3e

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