Malicious PDF — malware analysis report

Static analysis result for SHA-256 5078c92d1d5c0509…

MALICIOUS

PDF

43.0 KB Created: 2021-05-19 10:48:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 54cf20593c0214f5e7c41efd163dc2ed SHA-1: 37b14c206c9874854522d27bdf3b4c54aec49789 SHA-256: 5078c92d1d5c0509d456a7c0a5cb4c34702f8ff1cf997efbf30d9c4e35b68315
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary redirector URL is https://netcdn.xyz/app/431946152/free-roblox-girl-hair-not-a-model-game-hack, which is part of a campaign distributing malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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-roblox-girl-hair-not-a-model-game-hack In PDF document text
    • http://brinicombe.co.uk/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/add-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/robux-2021_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coinmaster_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/claim-free-spins-coin-master_GM406889139.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_off00004802.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4802 27020 bytes
SHA-256: 7ada6119f5108090de9fd0bad740efc38b362d6524e46074abb8de38eef6f135
font_01_sfnt_off00008465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8465 18772 bytes
SHA-256: 66482e13b1b0d91169bd4f4980226da82ba760cd479aff25d2e3a1e388705405

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