Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9ad83c26a55558…

MALICIOUS

PDF

35.4 KB Created: 2021-06-29 15:06:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8e9b81921cc2327ee10df7fa2491f5de SHA-1: d4ee93fe8f80ab82d4a9e4d0c261b144af5af8bc SHA-256: 5b9ad83c26a55558351c894ee861afbcb290624ab74755b21466a9c80110f9b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as free game hacks or currency generators. The primary lure URL is http://netcdn.co/app/431946152/get-robux-free-no-disabling-adblocker-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting potentially harmful websites.

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/get-robux-free-no-disabling-adblocker-game-hack In PDF document text
    • http://artistaone.co/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/timber-roblox-hack_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-doumins-to-wear-out-of-game-roblox_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/hack-de-sexo-roblox-tutorial_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-free-robux-generator_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000313b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313B 22684 bytes
SHA-256: de9be804784b9b0904f56d16eda003076a88b0ecc7b8df2b11ae8a71b34d38d9
font_01_sfnt_off000063eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EB 19528 bytes
SHA-256: a993ac3aaa037cc037c8b68253b337892d68a2ca6f8be837925e989b6d4b31fe

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