Malicious PDF — malware analysis report

Static analysis result for SHA-256 b479a25f62719098…

MALICIOUS

PDF

33.9 KB Created: 2021-06-27 11:53:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: de0a25f9fd757296e9c82a2f4cfa0f79 SHA-1: 22af0866b5279ea4cc5dbfd17e3b381afb9b778d SHA-256: b479a25f62719098db80c6d9b1b86f7138fddf0b2309af094fd4bd21c02ffe9f
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA lure to trick users into clicking a link, which is a common social engineering tactic. The embedded URL and numerous similar URLs in the document body suggest a phishing or scam attempt aimed at distributing malware or harvesting credentials. No scripts were extracted, but the overall structure and heuristics indicate a malicious PDF designed for user deception.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-do-i-get-free-robux-now-game-hack PDF link annotation
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-phantom-forces-hacks-fly_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hacker-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/como-hackear-roblox-adopt-me-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/teach-me-to-hack_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_off00002fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDD 21476 bytes
SHA-256: 3b8731a4c6c1949dffdc3ff78a8f807c2b10f2dcfa7c2f79d28aaa7cd4356d6c
font_01_sfnt_off00005f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F14 19152 bytes
SHA-256: f2fea7a3d130f2b3b268d5bcb238dfc55f31eb380597ca9c9967ae2aceb8029c

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