Malicious PDF — malware analysis report

Static analysis result for SHA-256 309c96a1699b9e65…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 14:13:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 83087e726e884db4da5abae253445717 SHA-1: 94d35aefcdf29d0698520eca918df828ef3a60b5 SHA-256: 309c96a1699b9e650b358726ee33840fec817afcbc37255ae72d232978c3feee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to malicious redirector URLs. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

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/406889139/coin-master-hack-8-ball-pool-game-hack In PDF document text
    • http://brinicombe.co.uk/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coinmaster_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/wurst-112_GM479516143.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-really-hack-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_off000048d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D8 24964 bytes
SHA-256: 7d49b3a0d8982935371859c2ec8c5bce6cc207b32fa1b6745c4e88d8b969ad5c
font_01_sfnt_off0000824b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824B 18372 bytes
SHA-256: a36c8568268bd3843c99b13e037ad7d172b032abb8e2fd77dcfbea09e612cebb

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