Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc7a603f04a4eff…

MALICIOUS

PDF

35.1 KB Created: 2021-06-23 00:14:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b1fbd16ebf8c0f7a3fd8fd1502b2eef3 SHA-1: 78fd600a122f6ffbf9bd2b1bbef24d34e0f3ec49 SHA-256: ddc7a603f04a4effbb40054d40aa9550eef75de80e11fba20e30ef50c1e3bfe7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox and Minecraft. The ML classifier strongly indicated maliciousness, and the embedded URLs are highly suspicious, suggesting a phishing or malware distribution lure. No scripts were extracted, but the document's structure and embedded URLs point towards a social engineering attack aiming to redirect users to potentially harmful content.

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-hack-trolling-download-game-hack In PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/how-to-bypass-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/pokemon-go-free-joystick-mod-ios_GM1094591345.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/booga-booga-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.vkinstitute.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.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_off00002ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF1 22868 bytes
SHA-256: aedb33ff6c49cd14a6636b97000511cd00d546686ad985a206a744bbc2e9078a
font_01_sfnt_off0000636e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636E 19284 bytes
SHA-256: 7dae9059a1a481053796888ae65972ff0cbf86c31a082dc758deb7124fc192fd

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