Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fae286e0f8869a…

MALICIOUS

PDF

46.3 KB Created: 2021-05-17 03:56:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b6a066c488e8954c53eee13f57b286ef SHA-1: 726087afcb1693dca33ec71b805c089714797bf2 SHA-256: c5fae286e0f8869ab942f0427344ff7ff0317435f19b5b33627e0a35c11e42ab
200 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to trick users into interacting with malicious links. The primary link, https://netcdn.xyz/app/431946152/20210-robux-game-hack, is associated with known malicious redirector infrastructure. The document's structure and embedded URLs suggest it is designed to deliver a second-stage payload or redirect users to a phishing or scam site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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 https://netcdn.xyz/app/431946152/20210-robux-game-hack In PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/robloxheroxyz-free-robux_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b4a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B4A 27128 bytes
SHA-256: 735f7b18d6ece0ead83cde376722e021330056d644919b949898efa953aae84a
font_01_sfnt_off00008853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8853 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9262 18252 bytes
SHA-256: c6c6b837e22de3676a2ba596b9db5dc5a1db3890ceafc7e2998a39c6caf756de

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