Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ca776346e90390…

MALICIOUS

PDF

255.1 KB Created: 2021-04-05 13:33:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8549a5dc9c80bcacbdc013ac8d3b4d9a SHA-1: 48a96fceff08d88a9a23f54a2355a4d38fefd3d3 SHA-256: b9ca776346e90390b55c075e924c348245057939facdb25accc560e37fe68a1e
112 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a specific phishing signature related to Roblox. The document body, though heavily obfuscated, contains references to 'Roblox' and 'Free Robux', and a heuristic firing indicates a fake CAPTCHA or human verification prompt. An external URI pointing to 'gaminggenerator.org' with 'free-robux' in the path further supports a phishing lure for game-related currency. The presence of embedded PDF streams suggests potential for exploiting PDF vulnerabilities or embedding malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0958

Heuristics 5

  • ClamAV: Pdf.Phishing.Roblox062100-9873116-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Roblox062100-9873116-0
  • 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/wheel-decide-roblox-free-robux PDF link annotation
    • https://www.seeingindependence.org/images/roblox-sex-hack-script.pdfIn PDF document text
    • http://paro.net.ua/images/a-free-game-of-roblox.pdfIn PDF document text
    • http://bkd1.balikpapan.go.id/images/how-i-get-free-robux-nicster-v.pdfIn PDF document text
    • https://kinderdam.nl/images/free-robux-without-human-verification-or-survey-or-download.pdfIn PDF document text
    • http://torkelson.se/images/roblox-commands-hack-download.pdfIn PDF document text
    • https://www.romedia.gr/images/free-roblox-redeem-codes-2021.pdfIn PDF document text
    • http://possumholler.us/images/free-clothes-on-roblox-2021.pdfIn PDF document text
    • https://studiodegaetano.it/images/best-tycoon-for-roblox-for-free.pdfIn PDF document text
    • https://www.cfdcnv.com/images/roblox-site-hacked.pdfIn PDF document text
    • http://glll.de/images/free-roblox-merch.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-robux-games-to-play.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/pastebin-com-robux-free.pdfIn PDF document text
    • http://76remont-kvartir.ru/images/free-give-code-away-roblox.pdfIn PDF document text
    • http://dermatologos-thessaloniki.gr/images/roblox-apocalypse-rising-shenanigans-mod-cheat-codes.pdfIn PDF document text
    • http://torkelson.se/images/roblox-pedo-van-hack.pdfIn PDF document text
    • http://soma.com.ua/images/how-to-make-t-shirts-in-roblox-for-free.pdfIn PDF document text
    • http://learningarabic.co.uk/images/como-convertirse-en-hacker-en-roblox.pdfIn PDF document text
    • http://hydroconseil.net/images/roblox-hacks-to-hack-any-game.pdfIn PDF document text
    • https://www.olboys.it/images/bhop-hacks-roblox-2021.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-roblox-accounts-with-robux-2021-1.pdfIn PDF document text
    • http://safwafurniture.com/images/how-to-get-free-robux-ipad-2021.pdfIn PDF document text
    • http://e-mailservis.cz/images/get-free-robux-discord-server.pdfIn PDF document text
    • http://www.lionel-seppoloni.fr/images/form-1-roblox-hack.pdfIn PDF document text
    • http://m-sv.net/images/how-to-get-free-robux-2021-no-verification.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-robux-for-surveys.pdfIn PDF document text
    • http://smart-pro.co.uk/images/how-to-get-free-robux-quick-and-easy.pdfIn PDF document text
    • http://baah.ca/images/dragon-ball-x-in-roblox-hack.pdfIn PDF document text
    • http://mainzer-marktplatz.de/images/how-to-hack-roblox-2021-no-human-verification.pdfIn PDF document text
    • https://pompesfunebresleveque.fr/images/roblox-parkour-hack-script-pastebin.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/comoponerse-hacks-en-roblox.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0003906d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3906D 24320 bytes
SHA-256: 9ae8a4db72ee6ff7132ee41af7e6608f8c4476ef8442733fa33d619fd25b792c
font_01_sfnt_off0003c7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C7F8 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0003d4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D4A0 18284 bytes
SHA-256: 1ab3a9f93f676d24adf116db947bd7f49f1b709811367122d17e49626ae7f4ce

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