Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae978e1bf011be02…

MALICIOUS

PDF

46.7 KB Created: 2021-06-09 13:06:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ae5659f433fd9897958f05a94dac1c31 SHA-1: 68091d5c1b0643269aeaddd438e6c415a4083327 SHA-256: ae978e1bf011be028381099b103824d1cd93a14f9920bdcf4473816f7d61f3d3
82 Risk Score

Malware Insights

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

The ML classifier and brand impersonation heuristics strongly indicate malicious intent, specifically a credential phishing lure related to Roblox and Netflix. The embedded URLs, such as https://netcdn.tw/app/431946152/can-you-get-arested-for-having-a-roblox-hacker-group-game-hack, likely lead to a malicious site designed to steal user credentials or deliver a second-stage payload. No scripts were extracted, but the PDF structure and embedded URLs suggest a direct redirection to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/can-you-get-arested-for-having-a-roblox-hacker-group-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/can-you-get-arested-for-having-a-roblox-hacker-group-game-hack PDF link annotation
    • http://repository.ummy.ac.id//repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-obc-roblox-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/robux-hack-link-in-desc_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/is-roblox-free-on-the-computer_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-codes-xbox-one_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_off000051d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51D0 26768 bytes
SHA-256: 5911a12ae5697f27ece0566fa92e19fcd4be51dec32cf39f0c8b603d4f7d525f
font_01_sfnt_off00008fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE1 19624 bytes
SHA-256: 8d66127f40feb6e02ddde3417682a271168c07beffb168dd3dbae512f21f9a05

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