Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0664a3e61ff352a…

MALICIOUS

PDF

47.2 KB Created: 2021-05-13 21:30:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 92bc04e36963333214f994772313e1eb SHA-1: 281b3151c9731ab758c7c6b962413bd2458cf4d9 SHA-256: c0664a3e61ff352aea94463744a996a839fc9ffc6313747d1aef9d64c291620c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The document body, though partially garbled, also contains references to these lures and embedded URLs. These findings indicate the document is designed to trick users into visiting malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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 https://netcdn.xyz/app/431946152/ways-to-get-free-robux-game-hack In PDF document text
    • http://huounaixunghe.com/images/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://huounaixunghe.com/images/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://huounaixunghe.com/images/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://huounaixunghe.com/images/roblox-hack-tool_GM431946152.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_off00004723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4723 27004 bytes
SHA-256: 74550c01061a05f14ec91b03f8ae903ad8c6492abd2fcde542f1c0971fcce7a4
font_01_sfnt_off0000860a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860A 4616 bytes
SHA-256: ee05eca01f82cb0b3f03a92e59a1245623788df543d8f530dd3a846e2e30a3e9
font_02_sfnt_off0000948e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x948E 18724 bytes
SHA-256: b2cd5ec598a8c260812e966e9710fb38f03066217a6d0ec8f431d8a9dca8af42

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