Malicious PDF — malware analysis report

Static analysis result for SHA-256 033e54c5ca112dbb…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 11:57:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b04806a93c14552fc83742028dd50fdc SHA-1: 17e29f803b733450ba14d315bae4430f5433e33f SHA-256: 033e54c5ca112dbb29a371f8d869c5f8857b57903a684df612c5c85ec80a5463
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting a "free Robux generator" lure. The document body and heuristics indicate a clear attempt to trick users into visiting a malicious URL. 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.tw/app/431946152/free-robux-generator-for-roblox-2021-game-hack In PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-account-with-limited-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-free-robux-and-obc-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/cool-tshirts-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-download-free-full-version-pc_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/tiktok-free_GM835599320.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/new-hack-for-roblox-deathrun-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/fortnite-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/how-to-bypass-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/updated-free-roblox-shirts_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/hack-software-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-strategy_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_off00002ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED0 22240 bytes
SHA-256: e7f835a066a8110f3e99c580f76b279e7eaaacdbbcb3ac80f738b0c8398eb0fd
font_01_sfnt_off00006039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6039 19296 bytes
SHA-256: 1c5b5ef18537994d2b9d4bcfadda653dfd61b801510ea22c778e1317dc9212ff

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