Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2c77ebbd565b5d…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 08:55:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c75d91cb529f66175e16b8952acd5bd7 SHA-1: 4b49ad81aecd8509cdc4dbd74bf802a6b80c55b2 SHA-256: 8e2c77ebbd565b5dbe8b046220943e320456841fed9a14d9f4d8af2542f614f5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one critical link to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/robux-adder-game-hack. This URL is presented as a 'free generator / game hack' lure, indicating a social engineering tactic to trick users into visiting a potentially harmful site. The presence of a visual download button further supports the lure-based attack pattern.

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/431946152/robux-adder-game-hack In PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-robux-fast-free_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/pokemon-go-free-offers_GM1094591345.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/youtube-free-robux-obby_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/como-tener-robux-gratis-en-roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-script-hack-on-roblox-lumber-tycoon-2-money_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-use-cheat-engine-66-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-free-robux-2021-easy-no-inspect_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-no-scam-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/what-is-the-best-looking-thing-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coins-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-roblox-gift-card-codes-not-used-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-ad_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
font_00_sfnt_off00002dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCA 22068 bytes
SHA-256: f18a41e3234ac81a30eba0a4ec3cded87558c1c3e695449bcd917021fd120265
font_01_sfnt_off00005ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC8 18728 bytes
SHA-256: 3b2fbc11f7fc4968e007f9e7fb47eadfc314f2fb387d3ffbdf3f14f8961f86d5

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