Malicious PDF — malware analysis report

Static analysis result for SHA-256 768ead1fa7536652…

MALICIOUS

PDF

35.0 KB Created: 2021-06-29 14:28:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8667af6c59caad8d1fb9516f011a7dfb SHA-1: 6eb71f0a80c9102fc42dc9bf5a42e0dc750ec22a SHA-256: 768ead1fa75366526e3b448a2b5f68b938d42372be42d3181b576acaf34393f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/how-to-speed-hack-on-roblox-jailbreak-2021-game-hack, which is associated with known malicious redirectors. The document body and embedded links suggest an attempt to trick users into downloading potentially unwanted or malicious software. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/how-to-speed-hack-on-roblox-jailbreak-2021-game-hack In PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-local-player-script-hack_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/blackout-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/noclip-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/i-think-ive-been-hacked-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-roblox-exploits-that-supports-loadstrings_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-hack-installer_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-your-self-getting-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hack-catalog-roblox-mod-menu_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-robux-in-roblox-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/a-code-froom-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hack-mod-coin-master_GM406889139.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_off00002fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC2 22176 bytes
SHA-256: f734fe0986d0b620e0968cdb993f9dfda6ec142f13c1dda3fe06b35a6dc606f5
font_01_sfnt_off0000610e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610E 19860 bytes
SHA-256: 107c5ae74737b68a0c9f60e4fa1829c0e13c695edd8f88a7f408c4e367c3c31d

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