Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4ae277855efa17…

MALICIOUS

PDF

47.9 KB Created: 2021-06-09 07:21:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4517f7184591eb20ece6ee90ea65c0b2 SHA-1: 8b44fcc1e4f049705d827ec9e1411765b5aba788 SHA-256: 1c4ae277855efa170c3d53b032c3bff393aca4c5bcb41651b22768417ace6820
82 Risk Score

Malware Insights

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

The PDF document contains a lure for 'Free Robux' and impersonates a brand, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URIs and a call-to-action button indicate a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/free-robux-promocodwes-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/free-robux-promocodwes-game-hack PDF link annotation
    • https://repository.stikesindramayu.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/hack-pour-roblox-farming-simulator_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-bee-swarm-simulator-script-gui-free-bees_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/claim-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-mighty-lion-card_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FE 24308 bytes
SHA-256: 27a804cad49ef91ae32d4e8756ffc69257a4795ca08bce8c7e9248cd14c45fb5
font_01_sfnt_off00008a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A91 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9738 18764 bytes
SHA-256: e0919ca6a56b4cea366fcdb5bdf799542de694f21db3c6fd214ab2ef1045a224

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