Malicious PDF — malware analysis report

Static analysis result for SHA-256 032de03a84270312…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 13:03:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 50bca22cbec04915102f5015f8d92a98 SHA-1: d6547cda07cb613f7ce9303a5c5053b89f8abd6a SHA-256: 032de03a8427031293806c0d52c6f30e7a331078bfe853ae1d7bc2ac11b0fac4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.tw/app/406889139/coin-master-app-hacks-game-hack. The document body text and embedded links suggest a lure for game hacks and cheats, aiming to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or redirection attack.

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/406889139/coin-master-app-hacks-game-hack In PDF document text
    • http://library.umla.ac.id//repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/all-roblox-games-you-can-hack-with-proxox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-hack-top-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-wiz_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-likes-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-2021-no-human-verification_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_off00003431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3431 23440 bytes
SHA-256: 8dc90cfaa5f03e2c3e6c02ef0830c18c5325bbb80637840f79470130c3339252
font_01_sfnt_off00006926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6926 18180 bytes
SHA-256: 7da720255189ee7148b3a15459f8235b370ac0c6f406201341355dab7c471ca0

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