Malicious PDF — malware analysis report

Static analysis result for SHA-256 8439efbb228a5705…

MALICIOUS

PDF

43.1 KB Created: 2021-05-14 06:44:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2813fe5fdf41391c7df3bb5462db78b5 SHA-1: 2885c3e02b9d5ece5498e0f5a57be1c549e6ba02 SHA-256: 8439efbb228a57053fc7308e37fea9c77f22dd78dad31967988be2132217add9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hack generators. The primary lure is a link to 'free-robux-websites-no-human-verification-game-hack'. The document body and embedded links suggest a phishing or scam attempt to lure users to potentially malicious websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-websites-no-human-verification-game-hack In PDF document text
    • http://dana1157.com/images/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://dana1157.com/images/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://dana1157.com/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/how-to-earn-free-robux_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49C9 25608 bytes
SHA-256: 8b030d9fa3c7aaa89bc0df7e1c6bffdeb513241ff45a732e7f6bae6699e0c304
font_01_sfnt_off000083e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E2 19056 bytes
SHA-256: b278ed256549c6e4f6c448dba943d0e72c7f64ebe7340c12334ea4705f26c648

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