Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd4d13146da3c33…

MALICIOUS

PDF

35.8 KB Created: 2021-06-26 00:19:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8a5f2613f0f2a26377050ef6d42c0cdf SHA-1: a5180bbf68a21e0425d684a0d45853d617b618ba SHA-256: 3fd4d13146da3c33bf9805eead9cb07e827e17b5e844ef4db055985b7d96b20d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising free game generators and hacks. The document body and embedded URLs indicate a lure for users interested in obtaining in-game currency or cheats for popular games like Roblox and Coin Master. The primary malicious link identified is http://netcdn.co/app/431946152/3-roblox-games-that-promise-free-robux-game-hack, which likely leads to further malicious content or malware download.

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/431946152/3-roblox-games-that-promise-free-robux-game-hack In PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/comment-avoir-un-hacker-sur-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/roblox-titanic-free-games_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/roblox-generator_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/robux-today_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/roblox-free-robux-no-verification_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_off00003258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3258 22600 bytes
SHA-256: c5954e639362587e8f4979220d2360cae49c6ef3b29a4d502881c8cd14be73f3
font_01_sfnt_off000064ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EE 19768 bytes
SHA-256: b1176003ba8b6fea882a1aa5240cd583988ed16864c05ff93a053b09869f1f6d

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