Malicious PDF — malware analysis report

Static analysis result for SHA-256 c594c15d6fce5e5d…

MALICIOUS

PDF

46.1 KB Created: 2021-06-10 21:43:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bfc7269ba26d316a3041104dd02dba30 SHA-1: c994e4f802f8f69fe2053701c51ac854876940c7 SHA-256: c594c15d6fce5e5d12300ac718fb0b056df8b881de65bbe031c904d26636f8bd
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1553.005 Mark-of-the-Web Bypass

The document impersonates Microsoft and uses a lure related to Roblox hacking to trick users into clicking a malicious URL. The ML classifier strongly indicates maliciousness, and the presence of external URIs and brand impersonation for credential phishing are key indicators. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a potential for exploitation or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.tw/app/431946152/how-do-you-hack-players-on-roblox-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.tw/app/431946152/how-do-you-hack-players-on-roblox-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-tablet-hack_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-executor-cheat-engine_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-unlimited-xp-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/microsoft-free-robux_GM431946152.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_004_off00004e1a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E1A 28000 bytes
SHA-256: e5cc8e2b7bd510a59b93c49ea89ce341fb491f7c0c23f7b51e699632f909fa83
font_01_sfnt_off00008ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EDE 19152 bytes
SHA-256: b6622d7faf544c8be16877e0fb6cb59415468562a279b29e3aa9e3317f4b9d62

Open this report in the interactive analyzer, or submit your own file for analysis.