Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc39441fb361508…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 20:21:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1324f9b876d4e58b52cf2fc09706dc10 SHA-1: e493fb1674279682e0c82bf535769519eac32834 SHA-256: ecc39441fb361508d1f95e63b7ae03685d583fcaf1fb0dca75fa1d845b4f4f30
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a 'free generator / game hack'. The document body and extracted URLs reinforce this lure, aiming to entice users to click through to potentially harmful content. No scripts were extracted, but the presence of malicious redirector links strongly suggests an attempt to lead the user to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.tw/app/479516143/minecraft-hacks-game-hack In PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/are-there-any-free-swords-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-get-1-billion-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/tiktok-free-skin-event_GM835599320.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/kazok-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/what-is-wurst_GM479516143.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/hack-someone-account-roblox_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/skywars-hack-roblox-rubis-weaping_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-cards-codes-live_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-roblox-account-getter-v3rmillion_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/speed-hack-script-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-codes-2021_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_off00003378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3378 22528 bytes
SHA-256: 1fd17c517e3c813a25bd749234e23b76bb5ccad1f3cebfa3ccffbc874e876b6b
font_01_sfnt_off0000659e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659E 18024 bytes
SHA-256: 1c9d96dc2872e32a417b1efa44fe2d308041ce7ded0f789352e35eeb38f40ed7

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