Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0d881a8b42725d…

MALICIOUS

PDF

36.1 KB Created: 2021-07-03 13:44:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: df77d0af331f1142e484aacd9cbd5f4c SHA-1: b2adc26488c19dec89e1ea8cd5697d0962111983 SHA-256: fc0d881a8b42725d4b086656841b82b96512d39068a52e6bf3b752427632f4b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as "free generators" or "game hacks" to lure users. The primary redirector identified is http://netcdn.tw/app/479516143/free-minecraft-java-edition-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at driving traffic to malicious sites. The ML classifier also flagged this document with high confidence.

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/free-minecraft-java-edition-game-hack In PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/pokemon-go-free-download-latest-version_GM1094591345.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/roblox-hack-clothes_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/no-verification-coin-master-hack_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_off0000368c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x368C 22920 bytes
SHA-256: 8f1251e057d593463fda0e56a5b31a06ce6185c8a9ef2c4f16c55082fb9997b9
font_01_sfnt_off000069f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F0 18452 bytes
SHA-256: d83f40a0e6f207785081a15a357f7faef04f5cec5f9f625e4715c9d92afd3c55

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