Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae7e1db73921844…

MALICIOUS

PDF

34.3 KB Created: 2021-06-28 12:51:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d4d4ee63777ab5d6e725b7fb79bcd211 SHA-1: 15b97d400fd7e3c1f28a9dba02246647abf707e5 SHA-256: 6ae7e1db73921844e3caf19b41a0e4b5998038bec407fa43cd2fcb734e7f1bf5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links disguised as game cheats and hacks, with a high-confidence heuristic indicating invisible links leading to a CAPTCHA-themed web lure. One of the embedded URLs, http://netcdn.co/app/431946152/roblox-free-vip-hack-game-hack, likely serves as a download source for a second-stage payload. The document's structure and content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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 http://netcdn.co/app/431946152/roblox-free-vip-hack-game-hack PDF link annotation
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/robux-free-no-fake-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-follow-a-player-everywhere-he-goes-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-robux-site-for-comuters_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/level-6-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-free-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/redeem-roblox-promotions-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-robux-no-verify-captcha_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/robux-cheat-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-guest-666-shirt-free_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-2021-hacks-catalog-free_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-shred-money-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-robux-restraunt-tycoon_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-roblox-accounts-with-robux-2021-november_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
font_00_sfnt_off00002ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC7 22416 bytes
SHA-256: 31e8b553bf63ac740d81ba9f9c503e41cc9c6e85f38f47650cdd4ff0a9ef63ec
font_01_sfnt_off0000609d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609D 19252 bytes
SHA-256: 180f66fdcd970329716c49e24e3604c2ba76db7eae2975ecdd68ea3b1023a7df

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