Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a8b0b33c81dfd57…

MALICIOUS

PDF

36.3 KB Created: 2021-07-05 04:44:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e56a3ad7dc036e43963931de2980308e SHA-1: 30d1e6a46fa75edec903ff59432ca83cb10eee27 SHA-256: 4a8b0b33c81dfd5785e35a1e9ce61e32ca99aaba653d164b9c08ed201d26ebb4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of free in-game currency and hacks to trick users into clicking malicious links. The primary link, http://netcdn.tw/app/406889139/coin-master-free-coins-app-game-hack, is identified as a malicious redirector. The document's structure and embedded URLs suggest it is designed to lead users to potentially harmful websites, likely for further malware delivery or phishing. No scripts were extracted, but the PDF's nature and the identified malicious URL strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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-free-coins-app-game-hack In PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/como-hackear-una-cuenta-de-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-superhero-simulator-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/script-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/pokemon-go-free-candy_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-free-admin-powers-game_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/robux-gratis-hack-sin-verificacion_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/tofuu-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-free-body-bundle_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-get-25-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-pointsprizescom_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF2 22468 bytes
SHA-256: 19665821f03246094418b483a68a15103566e6ae0e9364cad8d38cf97ad93f45
font_01_sfnt_off00006144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6144 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B29 18176 bytes
SHA-256: 78fd92e643045a663d15c45c74126e1d779604aea3e1437bd5d883e9616c0973

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