Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef14b960d81f400…

MALICIOUS

PDF

48.2 KB Created: 2021-05-16 18:30:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 62c3bacf94b779030ea7c3e2b309d7e0 SHA-1: 66c79cf581f33804304871ccc0b5e225787ae866 SHA-256: 6ef14b960d81f4009de3044db476fbc1e1c28b9cdc9ad95d01fd38710666ac73
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and 'game hacks'. The document body and embedded links strongly suggest a social engineering lure designed to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-today-game-hack In PDF document text
    • http://library-fkip.uho.ac.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/apps-to-hack-coin-master_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c26.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C26 28348 bytes
SHA-256: 5d3850455dbef1156ce1a0d86b08713c51e310d8091efe5eec11b001283a908b
font_01_sfnt_off00008dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC1 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off000098ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98EA 18596 bytes
SHA-256: 123b3c01001442c78a22a4b95c046930f1463c344676a890e106be4cc216f6f4

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