Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a8d6dc8163a489…

MALICIOUS

PDF

26.2 KB Created: 2021-07-05 02:29:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 77503d811fe19c73d1ca8167f31b3b35 SHA-1: 334349952b65a2fa941a8ec2f556baa02161df33 SHA-256: a0a8d6dc8163a48901ca3ff5c6b6671ca9e943960175fa163b867cf2528f5e56
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and free generators. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-400-spin-link-game-hack, which is flagged as a known malicious redirector. While no scripts were extracted, the embedded URLs and the nature of the lure suggest an attempt to direct users to potentially harmful websites for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 3

  • 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.
  • 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-400-spin-link-game-hack In PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-no-inspect_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-cheat-codes-n-text_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000322f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322F 22800 bytes
SHA-256: 0e00d9d4cce4a1440befdbd19744395eb4facf3076dac30b626ed65749b4a571

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