Malicious PDF — malware analysis report

Static analysis result for SHA-256 963457f8947d4bb1…

MALICIOUS

PDF

35.6 KB Created: 2021-06-28 10:05:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2fd3a3966f1f98a9dda692132026e641 SHA-1: 81087ed6d653ceffff8246ba8bc3f2459cd1eab1 SHA-256: 963457f8947d4bb1e588f1e17e6ee8f7cd9ac851669d6f317b5e6c7f7696f00e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free in-game items. The primary lure is for 'Roblox free Robux', directing to http://netcdn.co/app/431946152/roblox-how-to-get-free-robux-proof-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack designed to lead users to potentially malicious websites. The ML classifier also flagged this document with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-how-to-get-free-robux-proof-game-hack In PDF document text
    • https://i-photo7.com/image/data/files/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/minecraft-client-download_GM479516143.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-things-in-the-catalog-for-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-aesthetic-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/roblox-cheat-engine-robux-2021_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/pokemon-go-free-play-online-without-downloading_GM1094591345.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-spin-link-for-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
font_00_sfnt_off000032c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C6 22632 bytes
SHA-256: 6b9a6ce3f5c2d055d993d6702a4eadd8d1390b009ab69efea5915feb31e1b185
font_01_sfnt_off0000659a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659A 19212 bytes
SHA-256: f2f862c1cbbe5e0a187ddab3e933d605f594b90218e18c0d51f7538e60167910

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