Malicious PDF — malware analysis report

Static analysis result for SHA-256 629610534f6d4bcc…

MALICIOUS

PDF

46.1 KB Created: 2021-06-14 01:54:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 534a4e2c9bbb47638571f0b0b2d069ed SHA-1: ad3709268d7ff5476ff3f811516fe65f53e1e55f SHA-256: 629610534f6d4bccdf93abec1e59b7e7cd77b9ed4d577ef1aa55923b519e49a0
200 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and generators, presenting a fake CAPTCHA to trick users into clicking a malicious link. The embedded URL, http://netcdn.co/app/431946152/how-to-hack-roblox-sword-fight-on-the-heights-game-hack, is identified as a malicious redirector. The document's structure and content strongly suggest an attempt to lead the user to a malicious website, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-to-hack-roblox-sword-fight-on-the-heights-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-roblox-death-sound-ringtone_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-top_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/daily-free-spins-for-coin-master_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
stream_003_off00004bbd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BBD 29112 bytes
SHA-256: 39d3fc1e4a7739223cf18a35764ea38c3f20d3e10d418d5c1f3d82478747968b
font_01_sfnt_off00008ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED5 19360 bytes
SHA-256: 0a01dc1cbe290188d271718be70a7a8389b14e53519268ac8a1524652b78c8dc

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