Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1ff4efcd318811…

MALICIOUS

PDF

32.4 KB Created: 2021-07-20 09:52:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 76ef903ab06ed5f1d138f23cbe99dcfb SHA-1: 856ced40274c5c2d3f7d16d667e486a7f492513e SHA-256: eb1ff4efcd318811fc005b73613a17eb89dd42c63fbe7fbee7e831dbb43b362a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/try-minecraft-free-game-hack. The document body and heuristics indicate a lure for free game hacks or generators, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/try-minecraft-free-game-hack In PDF document text
    • http://learning.mtsn3banyuwangi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://learning.mtsn3banyuwangi.sch.id/__statics/gudangsoal/files/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • http://learning.mtsn3banyuwangi.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://learning.mtsn3banyuwangi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://learning.mtsn3banyuwangi.sch.id/__statics/gudangsoal/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://learning.mtsn3banyuwangi.sch.id/__statics/gudangsoal/files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://learning.mtsn3banyuwangi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://learning.mtsn3banyuwangi.sch.id/__statics/gudangsoal/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://learning.mtsn3banyuwangi.sch.id/__statics/gudangsoal/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://learning.mtsn3banyuwangi.sch.id/__statics/gudangsoal/files/how-to-get-verified-on-tiktok-for-free_GM835599320.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_off00002c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C20 22524 bytes
SHA-256: 6b8af410a336d043054b3735970870643ec469ebc6bb6fa4f4e50eb3b9b43dca
font_01_sfnt_off00005e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E36 17748 bytes
SHA-256: 107932d4c819bf12e68df3d86f91d46cdcad91a8442b853cf72bc94cc41b7ea1

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