Malicious PDF — malware analysis report

Static analysis result for SHA-256 77fa0193d142a5e8…

MALICIOUS

PDF

41.8 KB Created: 2021-05-19 20:36:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c7512aa931f3d126ecdb837f8f4b0b18 SHA-1: 7ae21022a642b64d85fc697c6c65e3b3f4bb605a SHA-256: 77fa0193d142a5e82bdf68d85de72e7a46cc7a7abe87f07dc422fb11f13be296
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The primary malicious URL identified is https://netcdn.xyz/app/1094591345/pokemon-go-free-shiny-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to exploit users through social engineering, leading them to potentially download further malware or be redirected to phishing sites.

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/1094591345/pokemon-go-free-shiny-game-hack In PDF document text
    • http://bufbd.org/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/infinite-robux_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/microsoft-free-robux_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_003_off000048bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BB 24660 bytes
SHA-256: 20f9e6b9193aab981500a94d872a2d4fe728fa4367450893c8b72233561c99db
font_01_sfnt_off00008155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8155 18308 bytes
SHA-256: 1ecd3551e02684294d0c3a1f7189651d77d17e4abc17f9516ecbf2be56701025

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