Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd16bf2b769fb33…

MALICIOUS

PDF

45.3 KB Created: 2021-06-09 14:38:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ee0ea108d0e8d81f27b718a81cf40492 SHA-1: 80953b6033a557c7f8ac3ece8ce40114fc99e405 SHA-256: bbd16bf2b769fb337f868f9a3151d5aa0fb71e39efb2413902dab10419f89318
82 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/roblox-speed-hack-btools-12.04.2021-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/pokemon-go-free-zekrom_GM1094591345.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/can-you-actually-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/pastebin-com-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-download-apk_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e5e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E5E 26980 bytes
SHA-256: 2d7aa3108452a270aeb0c2394de226fb88df8a35e1441f22d647cbc0205a2ec8
font_01_sfnt_off00008b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5A 19168 bytes
SHA-256: 8f4cdd531ef8daf2f5e3037b8a5bbe12903e601193fd72ffb9bfd3a37285d13f

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