Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a37784e462cf5a…

MALICIOUS

PDF

44.9 KB Created: 2021-06-02 00:26:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ba83c45343841df3429c857883fa86ec SHA-1: 4907c52196d2ff21a7cc98a94879485ae07487f7 SHA-256: 40a37784e462cf5ac97140eaf6bc16dd16d7a11327f939d8e7c06d0b51636780
82 Risk Score

Malware Insights

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

The document contains a fake CAPTCHA lure, which is a common social engineering tactic to trick users into interacting with malicious content. It also embeds multiple URLs, one of which is directly linked to a heuristic firing for an external URI, suggesting the document's purpose is to redirect users to potentially malicious sites for further exploitation or payload delivery. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.xyz/app/431946152/how-to-hack-roblox-jailbreak-keycard-game-hack PDF link annotation
    • https://priveecard.com/wp-content/uploads/fsqm-files/description-roblox-hack_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/real-way-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-robux-points_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/descargar-hack-para-roblox_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-roblox-exploits-2021-not-blocked-by-antivirus_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/roblox-synapse-exploit-free-cracked_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/roblox-hack-bugmenot_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/como-tener-robux-hack_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://priveecard.com/wp-content/uploads/fsqm-files/heroes-online-is-free-roblox_GM431946152.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
stream_004_off00005102.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5102 24972 bytes
SHA-256: ccfc720b3d76de8789e0be8e32ef74501a2f3363466889dab0cf71c8b356f545
font_01_sfnt_off00008a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A88 18984 bytes
SHA-256: a0da8c50f17010c799ed89e2a88af02b829a48503fd5f3c1eb9af711f2b8b69b

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