Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f9074378bf483a…

MALICIOUS

PDF

49.7 KB Created: 2021-05-15 10:05:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 41237589394b3e23583e8e81b4f42bf8 SHA-1: 5164a00f0e85540a5ed7cfff7553414b5f58687b SHA-256: d9f9074378bf483a4c17279566543854f95bb1c14b79224e0a3bf8852fafecad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free Robux' and game hacks. The ML classifier also flagged this PDF as malicious. The embedded URLs and the document body content strongly suggest a lure for phishing or malware distribution, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9349

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/how-to-get-free-robux-2021-no-human-verification-game-hack In PDF document text
    • http://bestmaids.co.uk/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://bestmaids.co.uk/images/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://bestmaids.co.uk/images/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://bestmaids.co.uk/images/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://bestmaids.co.uk/images/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://bestmaids.co.uk/images/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://bestmaids.co.uk/images/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://bestmaids.co.uk/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://bestmaids.co.uk/images/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://bestmaids.co.uk/images/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://bestmaids.co.uk/images/how-to-hack-a-minecraft-server_GM479516143.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_off00004bc2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC2 30072 bytes
SHA-256: f1cf0276147649c71cd701ab251dc30a69316e3df5cca6d80f8ebb9d52911f6b
font_01_sfnt_off00008ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF3 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C9A 19428 bytes
SHA-256: dfc7ca414cfca4f80301273998e01ceb4bfd22e3de883fcbe9d6a0102e8d41a4

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