Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbaa710a4f26682…

MALICIOUS

PDF

43.7 KB Created: 2021-05-10 21:00:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6bf309a87e397d25830f215d2787edd8 SHA-1: e380f52bcf90f35fd3e84168f1cd2d83cf7f2039 SHA-256: fdbaa710a4f26682249917bdd1632d8622152e09f889f0ac092168e5e5e78326
82 Risk Score

Malware Insights

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

This PDF document impersonates Microsoft to trick users into downloading a file from a suspicious URL, likely a game hack or cheat. The ML classifier strongly indicates maliciousness, and the embedded URL is associated with credential phishing lures. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-skin-creator-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-skin-creator-game-hack PDF link annotation
    • https://mobile.connecttravel.com.tw/image/data/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/robux-prices_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004acd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACD 28016 bytes
SHA-256: 9c0c147068750d8724d90e3fbeeb302327ef72991cfda1e7800a5890a777ea21
font_01_sfnt_off000089d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D0 17880 bytes
SHA-256: 6ea8c897df32785154eae70acc7007925f1db6a0c6d5753d8744b2502790b6f7

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