Malicious PDF — malware analysis report

Static analysis result for SHA-256 475a508638863f66…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 10:23:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bbd3bf0a4cc7cd929727a36da31fe927 SHA-1: 83fde475bee8e6f0f47a3d2b39e9aefe02c4cc29 SHA-256: 475a508638863f66f355a98b924b7a9b807da93abfb77e3ecaabe0e42c9fcd97
160 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it's a malicious redirector lure, specifically referencing 'game hack' and 'free generator' themes. The embedded URL, https://netcdn.online/app/431946152/roblox-redeem-game-hack, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Roblox Redeem' and the same URL, reinforcing the lure. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/roblox-redeem-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/oginject-co_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ECD 26024 bytes
SHA-256: d728e877631ff84bcb232bc898bac3b9f3ae2daf4ad23bf93194eae3e3e74a24
font_01_sfnt_off00008806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8806 18220 bytes
SHA-256: e19fc67664176b3280202982a82ef871938736b971858ad290e21be68fbbdd59

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