Malicious PDF — malware analysis report

Static analysis result for SHA-256 86434cf194234e46…

MALICIOUS

PDF

33.1 KB Created: 2021-07-06 22:22:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b6393ac84c635f58d68d4f38778e1235 SHA-1: 6d6c71ab86acbde2de02d2ab1cb666c7a04333b9 SHA-256: 86434cf194234e465b418ce606ad21fd66866053097d06fad16094ce2d88cbd8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and other PDFs, masquerading as game hacks and generators. The document body and embedded links suggest a lure to trick users into downloading further malicious content, likely to install malware or conduct phishing. No scripts were extracted, but the presence of malicious links and the ML classifier output strongly indicate a malicious intent.

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/479516143/is-java-minecraft-free-game-hack In PDF document text
    • http://mbbs.hr/files/v3rmillion-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/robux-generator-online-free_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/followers-hack-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/best-free-roblox-lua-executor_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-how-to-upload-audio-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/hack-gratis-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-do-u-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-fun-free-spins_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E73 22220 bytes
SHA-256: f9b082c2f2d98880ffdee4b58422ec79e22720e9d6beba9da683eafb655f89f6
font_01_sfnt_off00005f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3F 18136 bytes
SHA-256: 2fe6c90bad35e653b7658140d9b8ca9ec084e24d2e8e35657111ab8094fa997a

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