Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f35b10b726c052d…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 09:51:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e7015517d0ead6dce5b8b6cc124b69be SHA-1: 24d5a07d50355508d35611100f4865ebd49b5063 SHA-256: 6f35b10b726c052d09a3589f11f4eebfa849cb6e9149e425a48da5f62c623936
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that lead to a known malicious redirector, masquerading as a 'free generator / game hack'. The document body, though partially corrupted, contains text related to 'Roblox Hack Free Robux' and the malicious URL. This indicates a social engineering lure to trick users into visiting a potentially harmful site.

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-hack-free-robux-pastebin-game-hack In PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/is-roblox-downloadable-on-ps4-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/descargar-hack-roblox-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/high-vis-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/dfield-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-cheat-engine-64-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-games-without-password_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/bit-slicer-roblox-all-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hack-retail-tycoon_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/20210-robux-free_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_off00003209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3209 22108 bytes
SHA-256: d542b340f92581806aa999587cb4d02ae06d3a7e8396e0753006665fec60f4c2
font_01_sfnt_off0000632c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 19336 bytes
SHA-256: 7ac045a82896a511eb3f92f485cdf47c87047dd18efd43729f4c359489ad058d

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