Malicious PDF — malware analysis report

Static analysis result for SHA-256 4836b72935791b54…

MALICIOUS

PDF

34.0 KB Created: 2021-06-21 06:07:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7cb6c28defe03af1b460000296f6a91c SHA-1: 467520084a6aaebc06a2addfa2a5e2cbbb56d964 SHA-256: 4836b72935791b5489648d7ffa706bb5e3018a47b5d6462af5ef020966cdedf5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, using the promise of game hacks and free items to trick users into clicking malicious links. The embedded URL directs to known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. No scripts were extracted, but the PDF structure itself contains the malicious links.

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-shirt-codes-free-shipping-game-hack In PDF document text
    • https://loba.com.vn/public/upload/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-codes-that-haven-39_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-code-cards-website_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/does-roblox-have-free-sneaks_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/google-roblox-games_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-know-if-you-are-hacked-on-roblox_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
stream_002_off00002cdc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CDC 22380 bytes
SHA-256: 158854166257da92d3ab57588e66130eb2c8955e1465c1224bf829ac07da33b5
font_01_sfnt_off00005ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE9 19388 bytes
SHA-256: 6e1a0a544d8fc21f2291f71800d2442079bf2dc2c0286f6560b6d9a0bfb35319