Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f3cdc709a2dd1f…

MALICIOUS

PDF

46.7 KB Created: 2021-06-09 11:02:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3497614802421cdcadec86607ac71687 SHA-1: 8fab3fec68c5205ddb8b4f8c6eb43886aaaf3434 SHA-256: b1f3cdc709a2dd1f1fec7590e0c12391724557e8e52ffb4815979180b513e78a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a common lure of game hacks and free currency to trick users into clicking malicious links. The presence of a fake CAPTCHA heuristic indicates an attempt to further deceive the user into executing actions. The primary malicious link identified, https://netcdn.tw/app/431946152/how-to-hack-roblox-using-inspect-element-game-hack, is part of a redirector chain designed to lead victims to scam pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • 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.
  • 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
  • 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 https://netcdn.tw/app/431946152/how-to-hack-roblox-using-inspect-element-game-hack In PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/prison-life-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-jailbreak-mobile-cheat_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/how-to-hack-roblox-treasure-hunt-simulator-get-rebirth_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/razzberry-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/free-robux-no-login_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/accounts-that-give-free-robux-when-you-visit-it_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-offensive-hacks_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-crash-server-hack-script_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-hackeado-2021_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/como-hackear-robux-en-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/dragon-ball-super-2-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/how-to-get-10-000-free-robux_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/chaos-washers-on-roblox-is-getting-hacked_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/hack-for-maze-runner-roblox-exit_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-jailbreak-hack-com_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/how-to-hack-roblox-servers-2021_GM431946152.pdfIn PDF document text
    • https://www.emcladder.com/uploaded_files/userfiles/files/how-to-get-robux-for-free-for-kids_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_004_off00005494.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5494 27252 bytes
SHA-256: b0561b0ef9a0023b88caada34ccaeafa50ab86be3954b2177c5ddd1da20029eb
font_01_sfnt_off00009046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9046 19480 bytes
SHA-256: 48aaf9d952d85db214ff5a698921bee541cc9885c4ac51773e3343e512c5280a

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