Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b252e7937ec11e4…

MALICIOUS

PDF

35.2 KB Created: 2021-06-30 15:01:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 66b74585809ceed075478b14cf6c2e16 SHA-1: 4e347ec1b19a35a298780e5534adfbfea322bf13 SHA-256: 4b252e7937ec11e478942154ceaeaf55fd6d52f1b4a0fb6803160d934c36ffec
200 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Roblox hacks' and includes a link to a known malicious redirector. The document also displays a fake CAPTCHA, intended to trick the user into interacting with the malicious link. The primary malicious activity observed is the redirection to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-hack-into-someone-accont-in-roblox-game-hack In PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/earn-free-robux-legally_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/flubhack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/can-you-get-a-warn-for-hacking-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-to-make-vip-servers-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/sex-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-to-hack-robux-with-inspect-element_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/roblox-jailbreak-cheater-cage_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/descargar-hack-roblox-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/cool-free-robux-outfits_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/el-mejor-hack-para-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-cute-hair-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/robux-com-free-robux_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
font_00_sfnt_off00003223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3223 22404 bytes
SHA-256: a56e65d830f6906dcb9dd8e9fce41f5f6b96fcb9b3f7b6cdc06323b52b6faef6
font_01_sfnt_off000063ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EC 19184 bytes
SHA-256: 4b524090bce7905c7ecad51d68235c65dd13675e9772bd0e453fc43c9a7a090c

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