Malicious PDF — malware analysis report

Static analysis result for SHA-256 999044fc27cd5c3a…

MALICIOUS

PDF

46.1 KB Created: 2021-06-04 05:32:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 45f674c0aef66c095c21f5367dc41f15 SHA-1: 5097de5880c767cf4b733de6aa36767229b036c6 SHA-256: 999044fc27cd5c3af1579031d5a98ea16d3f8c093f19ac5435676bdb7d8ac4f2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a brand-impersonation lure, specifically impersonating PayPal to trick users into believing they can get Robux. The document contains a malicious URI that directs users to a suspicious domain, likely to download a secondary payload or phish for credentials. No scripts were extracted from this sample, but the presence of external URIs and the ML classifier's high confidence indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/how-to-get-robux-fast-no-hack-2021-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.online/app/431946152/how-to-get-robux-fast-no-hack-2021-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/open-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.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
font_00_sfnt_off00004f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F08 27668 bytes
SHA-256: cba2b9092154494e71b6ca9ab8326ab8929afe3c9f17becfc0c5ac52ced50272
font_01_sfnt_off00008f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2B 19084 bytes
SHA-256: 5d7a1fc01e01dbb8c186fa4cb03418653e18c7d5bc61a23f1fbbacf5c1fe6a83

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