Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bb87f79c6dbb219…

MALICIOUS

PDF

43.2 KB Created: 2021-05-18 01:30:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 89f92860665e9700ff3fa169fc07d4d1 SHA-1: ace711921fcf3f4e22fd33f4bdba7e56780b881e SHA-256: 6bb87f79c6dbb21933a0104ce0c8100719ebb4d8ba0134f8540a93858e991ae9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that are flagged as malicious redirectors, leading to sites promising 'free Robux' or 'game hacks'. The presence of a download button lure and the overall structure strongly suggest a phishing or malware distribution attempt. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-working-game-hack In PDF document text
    • http://parafia-nspj-lebork.pl/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/i-want-robux_GM431946152.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://parafia-nspj-lebork.pl/images/coin-master-no-download-app-but-play-for-free_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_off00004958.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4958 26476 bytes
SHA-256: ee5e738285c13b3dd88dc7544d0336448fdfad141e052d8aa1d5dd64903fbdbb
font_01_sfnt_off0000852d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852D 18788 bytes
SHA-256: 146362cb081aa7c6718ebc51132ca2538876dc1922f8d33668898621d3d02efe

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