Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea289cb49ae90ea9…

MALICIOUS

PDF

32.1 KB Created: 2021-07-08 16:26:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 63068a0a3078845daeefb98b841a3c88 SHA-1: 6bc780ae169df3ac335bb7b617c39ed838a90e7d SHA-256: ea289cb49ae90ea93b97eab4396ea1ab12367e1aeb81e216036c8ee4d1165b6c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lure users to a known malicious redirector infrastructure. The primary link, http://netcdn.tw/app/479516143/free-minecraft-alt-generator-game-hack, is presented as a way to get free game items or hacks. This indicates a phishing or scam attempt, likely to lead users to further malicious content or credential harvesting pages. No scripts were extracted, but the document structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/free-minecraft-alt-generator-game-hack In PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/free-account-roblox-november-15-2021_GM431946152.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/how-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/free-robux-no-surbey_GM431946152.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/how-to-get-free-face-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/join-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/how-to-cheat-roblox-anti-idle_GM431946152.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/roblox-legendary-football-vip-server-free-2021_GM431946152.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/pubg-mobile-uc-qatar_GM1330123889.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.harshulayurpharma.com/uploaded_files/userfiles/files/how-to-get-free-robux-in-minutes_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_off00002b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7D 21820 bytes
SHA-256: ec9d4d4efbd23018d899d6bd34a8454bd1a0baa9a98501fe77b80ceaba48a53e
font_01_sfnt_off00005b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B91 18072 bytes
SHA-256: c8f7285ff86763399e2a5ac55585dfb2fc2dace9f282f455ab031e88ea571d9c