Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0e350be763b896…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 08:53:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7821ee42bc4e2aac623caac3fd1a4d99 SHA-1: 1cd7d181f8fd27002873a4ea67f0ca14bb3f7d65 SHA-256: 5c0e350be763b896f567ae5f9348e543ddbe6ce8caba66325e7bf48278b10024
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating a fake CAPTCHA or human verification prompt, designed to trick users into interacting with malicious content. It links to a URL associated with 'free Robux' generators, a common lure for phishing or malware distribution. Although no scripts were extracted, the embedded URI and the nature of the lure suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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.online/app/431946152/how-to-get-free-robux-on-phone-game-hack PDF link annotation
    • http://atiltd.com.tw/upload/files/easy-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/collect-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-april-fools-hack-face_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-place_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/coin-master-free-spins-link-blogspot-2021_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
font_00_sfnt_off00004fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FA9 27048 bytes
SHA-256: ecde0a23fa40bca2ca74d2c0812962c2a1bde96e5e37727e49d7e2afdd5be5cf
font_01_sfnt_off00008da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA6 18600 bytes
SHA-256: 4aaa4dd608c1f398ea3b3714e579938e54c8b6ebc42d5b365d603cdfd05c4e85

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