Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1086f24e9a2967e…

MALICIOUS

PDF

44.9 KB Created: 2021-05-16 13:42:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6f4ed005d8d06b399d5ae91d6d89ce8f SHA-1: 72b17832514bde62940c29300af94635ed0de4a3 SHA-256: f1086f24e9a2967ea2237226016b3cd7c5c73ab5c28afef0b5cb3cbaa03db551
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting "game hacks" and "robux generators". The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of malicious links and the lure of free in-game items strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/what-is-a-robux-game-hack In PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/robux-earner_GM431946152.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://bibliotheque-perrigny-les-dijon.fr/images/moon-active-games_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4801 25764 bytes
SHA-256: 305ec33fb574b97a8e2c0c5939bdc4c3c68cabff3c39d71113f227519efb7a02
font_01_sfnt_off00008255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8255 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00008c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C16 18548 bytes
SHA-256: 3316b7a4d548223335f333f1efaf0184c5ffecf7c7bacabb6dd9a6d8e3ca5dd1

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