Malicious PDF — malware analysis report

Static analysis result for SHA-256 000ef1c300d91244…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 17:46:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 81a273c9e8a0218d2aff6996f2aceece SHA-1: 0dc752944af7158f669465794298807f3a6c208b SHA-256: 000ef1c300d91244fc2396a6b20a27561dc1d3afa9d7d1b174c725e12dfd1c99
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising game hacks and free currency generators. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-hacks-for-gold-cards-game-hack. While no scripts were extracted, the document's structure and embedded links strongly indicate a phishing or scam attempt designed to lead users to potentially harmful websites.

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-hacks-for-gold-cards-game-hack In PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-free-cape_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-builders-club-free-trial-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/pokemon-go-free-walk_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-hack-into-anyones-account-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/classic-minecraft-net-hacks_GM479516143.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
stream_002_off000030ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30CA 23128 bytes
SHA-256: a0a64fbf165e582b9cf51e2be1fa73d914bca5e9935b681ddde7224656c24668
font_01_sfnt_off000064db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DB 18416 bytes
SHA-256: 05bbfd58fa93bc695b21bb0c6c5cb13131497fa0aadcf4bf103cc410958f4448

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