Malicious PDF — malware analysis report

Static analysis result for SHA-256 223a2b6dd4839d56…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 21:42:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b7997e7cb9dc82e15d1f03eb9a0d6746 SHA-1: 5604178b1a78ca8612a5529a240ef42117c4c05f SHA-256: 223a2b6dd4839d56e66ba64c44e537208819032804a8c75572d0da35b323bfe5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a malicious redirector, masquerading as a 'game hack' or 'free generator' lure. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links confirms a malicious workflow. No scripts were extracted, but the document's structure and embedded URLs suggest it is designed to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

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.tw/app/431946152/roblox-free-3d-models-game-hack In PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/roblox-apocalypse-rising-shenanigans-mod-cheat-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/roblox-cheat-engine-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/roblox-redeem-robux-code-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-to-use-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/roblox-money-hack-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-to-get-unlimited-robux-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/roblox-gear-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-alt-accounts-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-robux-on-computer-for-kids_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-to-hack-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/minecraft-free-download-no-virus-and-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-robux-on-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-robux-glitch-july-2021_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_off00003080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3080 22116 bytes
SHA-256: 380b5b30bb93a078ab938308c18ffe5b3b041cce2d3228cc5ab8d2e8ce0eec9a
font_01_sfnt_off000061ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AD 19176 bytes
SHA-256: 6b50d5382abbe3c27b0ac4aa9e25b557a42c806cdb05d5f1a4ac903539f8f37c

Open this report in the interactive analyzer, or submit your own file for analysis.