Malicious PDF — malware analysis report

Static analysis result for SHA-256 0349f83e2fae39a2…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 07:32:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 49b2a560af2e09a85c08118a8dc6e134 SHA-1: c3dcdf4a5048bbcf000fa4dc4ea55631134909b4 SHA-256: 0349f83e2fae39a258b8df8cb03a969ad39f674cc1bbd66ace1f83dcc44e0b61
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded links, with a primary URL identified as a malicious redirector. The document body and heuristics indicate a lure for 'free generator' or 'game hack' content, designed to trick users into clicking the malicious link. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

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/835599320/free-tiktok-fans-no-human-verification-ios-game-hack In PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/tiktok-free-upload_GM835599320.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/likes-for-tiktok-free_GM835599320.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-free-link-spin_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
font_00_sfnt_off00003244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3244 22208 bytes
SHA-256: 6aa7649fcbe6edcf95b01906884bfd2b92bd34b0abdeea128f15c6bc81195d32
font_01_sfnt_off0000636c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636C 18508 bytes
SHA-256: d7b6ba605f9b0c2c31d2b583036125b5079603e91a5b030352140f23ac11b192

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