Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a0e7360808bc65…

MALICIOUS

PDF

36.0 KB Created: 2021-07-04 14:10:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0d2d755cd2d2f59313a4fee6548537a6 SHA-1: 7eb5b7ba2321a16f173c20929dd816649b3aa962 SHA-256: d8a0e7360808bc65e98ea5fc3ccc03af71b982428bd365851b3fb7d25bd538e0
160 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. The document body also contains the same malicious URL, reinforcing the lure. While no scripts were extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect the user to a site that likely hosts further malicious content or exploits.

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/get-free-spins-for-coin-master-game-hack In PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-robux-no-buying-apps_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-roblox-money-maker-download_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/freer-tiktok_GM835599320.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/roblox-phantom-forces-hack_GM431946152.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_off00003618.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3618 23272 bytes
SHA-256: b4a607956d488df1d6c4ce716982d07bb4deb9c8d0bcf0f9160a37550b2e912a
font_01_sfnt_off00006a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9D 18176 bytes
SHA-256: 76bfdde0d1dbaff2503b84320f04347c0e27e5afe98e240136eaf8f884d81ceb

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