PDF malware analysis — malicious · 55728e516231ec7c

MALICIOUS

PDF

46.7 KB Created: 2021-04-03 05:46:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: dfccc98a751d35c68f0895b1dba6b7f2 SHA-1: d856dfdee2f3faa52d1d05da71ea010ecede07c6 SHA-256: 55728e516231ec7c2c83af7026c21a6f0feca2e6c43cfd15a5599bc27fa44508

182 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document presents a fake CAPTCHA and instructions to run commands, a common lure for tricking users into executing malicious payloads. The embedded URLs and document body content strongly suggest a theme of Roblox game hacking and free Robux, indicating a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and heuristics suggest it may contain or lead to JavaScript execution for payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9192

Heuristics 6

Fake CAPTCHA with command-running instructions critical SE_FAKE_CAPTCHA_CLICKFIX

Document combines fake CAPTCHA or human-verification language with instructions to paste or run a command — a high-confidence ClickFix pattern
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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
External URI info PDF_URI

PDF contains an external URL action
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://gaminggenerator.org/app/431946152/how-to-get-free-robux-on-roblox-2021-without-waiting PDF link annotation
- http://www.mjclautrec.fr/images/how-to-noclip-in-roblox-with-cheat-engline.pdfIn PDF document text
- https://www.beaufortcollege.ie/images/how-to-hack-the-plaza-roblox.pdfIn PDF document text
- http://learningarabic.co.uk/images/ant-roblox-jailbreak-teleport-hack.pdfIn PDF document text
- https://www.milewood.co.uk/images/external-roblox-jailbreak-hack-2021-download.pdfIn PDF document text
- https://www.abrapppe.org.br/images/how-to-hack-using-roblox-client.pdfIn PDF document text
- http://www.rezbb.sk/images/roblox-robux-hack-2021-ios.pdfIn PDF document text
- https://www.elevage-chiot.fr/images/free-robux-hackget-up-to-22-500-free-robux-today.pdfIn PDF document text
- http://cosver.eu/images/how-to-hack-roblox-to-get-free-robux-on-pc.pdfIn PDF document text
- https://accord.kiev.ua/images/roblox-mad-paintball-2-hack.pdfIn PDF document text
- http://bkd1.balikpapan.go.id/images/cheat-engine-roblox-infinite-health.pdfIn PDF document text
- http://www.agri-tech.com.au/images/roblox-island-2-script-hack.pdfIn PDF document text
- http://kruiz21.ru/images/29-500-robux-free.pdfIn PDF document text
- https://www.saisystem.it/images/free-robux-website-safe.pdfIn PDF document text
- http://www.sapaengineering.kz/images/roblox-accounts-for-robux-for-free-geko97.pdfIn PDF document text
- http://www.lycee-langevin-wallon.com/images/ciris-roblox-hack.pdfIn PDF document text
- http://www.copoint.co.uk/images/how-to-hack-fly-on-skyward-roblox.pdfIn PDF document text
- https://www.stkdb.cz/images/how-to-get-free-robux-in-roblox-without-a-generator.pdfIn PDF document text
- https://www.albisser.ch/images/real-robux-hack-2021.pdfIn PDF document text
- https://accord.kiev.ua/images/cheat-engine-bypass-roblox-download.pdfIn PDF document text
- http://www.vktzunami.cz/images/hackear-roblox-cheat-engine.pdfIn PDF document text
- http://hemmet-strand.dk/images/dragon-ball-galaxy-roblox-hack.pdfIn PDF document text
- http://www.lycee-langevin-wallon.com/images/roblox-lightning-hack.pdfIn PDF document text
- http://www.maakherumusic.net/images/how-to-get-free-money-in-vehicle-simulator-roblox.pdfIn PDF document text
- https://www.iadh.bi/images/roblox-ice-cream-simolator-mit-fly-hack.pdfIn PDF document text
- https://gomsa.nl/images/roblox-vehicle-simulator-money-cheat-engine.pdfIn PDF document text
- http://nevesomost.by/images/free-roblox-members-for-groups.pdfIn PDF document text
- http://www.hawler.in/images/roblox-fallen-hack.pdfIn PDF document text
- http://www.evaplast.by/images/how-to-hack-roblox-accounts-and-get-passwords-2021.pdfIn PDF document text
- http://salantiskis.lt/images/roblox-account-steal-hack.pdfIn PDF document text
- http://aeroclub-kaernten.at/images/free-cheap-robux.pdfIn PDF document text
- http://www.inservis.cl/images/free-roblox-exploit-that-lets-you-use-gears.pdfIn PDF document text
- http://www.lionel-seppoloni.fr/images/free-robux-monte.pdfIn PDF document text
- https://esl.ipb.ac.id/images/hack-para-roblox-descargar.pdfIn PDF document text
- https://www.audev.com/images/hack-coins-pizzeria-roleplay-remastered-roblox-v3rmillion.pdfIn PDF document text
- https://www.hbproducts.dk/images/best-hacking-software-for-roblox.pdfIn PDF document text
- http://uctovnictvosnv.sk/images/roblox-sad-cheating-story.pdfIn PDF document text
- http://bilhetim.com.br/images/free-robux-game-uncopylockedf.pdfIn PDF document text
- http://echosvoix.ch/images/free-clothing-apps-in-roblox.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/roblox-robux-generator-tool-2021-robux-hack-robux-free.pdfIn PDF document text
- https://www.audev.com/images/hack-server-roblox.pdfIn PDF document text
- https://meltonschool.org/images/cmd-hack-roblox-jailbreak.pdfIn PDF document text
- http://ff-obertraun.at/images/free-roblox-clothes-website.pdfIn PDF document text
- https://consorziocsa-asicaivano.it/images/free-roblox-hack-without-human-verification.pdfIn macro / runtime command snippet
- http://www.eurosan1.ba/images/how-to-hack-a-roblox-account-password.pdfIn PDF document text
- https://www.air-shop.cz/images/how-to-get-free-robux-without-password.pdfIn PDF document text
- http://www.exikom.com.ua/images/roblox-account-hacker-no-download.pdfIn PDF document text
- http://sscclc.edu.ec/images/robux-hack-free-no-human-verification-or-survery.pdfIn PDF document text
- http://learningarabic.co.uk/images/alone-roblox-how-to-get-free-cash.pdfIn PDF document text
- http://www.kalaaliaraq.dk/images/broken-bones-iv-roblox-cheats.pdfIn PDF document text
+3 more URL(s)

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00005a5a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5A5A	23492 bytes
SHA-256: `0dfd63f20a03dea28dc72b63494631618bcb2a0f9d9256176f0fc5ada2f2fb45`
`font_01_sfnt_off00008f79.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F79	19152 bytes
SHA-256: `f3e69bc7b37ac68a44a9ce8cb3763ac757785fa5decc945b5be47620fc2d35fc`

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