Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27001fa75675855…

MALICIOUS

PDF

36.1 KB Created: 2021-06-30 08:02:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1795e9c9ddd6e9f43805a972cc9a857e SHA-1: b77937843098bea823a8fdbec3c0dc0ad9cb4d62 SHA-256: e27001fa756758559b1262e95f5fe62d9f68def7e215cad6c311a96a2a759405
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and generators, embedding multiple links to redirector infrastructure. The primary redirector URL, http://netcdn.co/app/431946152/new-roblox-nolcip-hack-2021-march-game-hack, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious workflow designed to lead the user to potentially harmful content or further downloads.

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/new-roblox-nolcip-hack-2021-march-game-hack In PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hacking-roblox-thumbnail_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/is-robux-free-for-today_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-noob-vs-pro-vs-hacker-vs-glitcher_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-assassin-moving-cheat_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/como-hackear-ropa-en-roblox-de-personas_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/fly-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/can-i-hack-pubg-mobile-uc_GM1330123889.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/pokemon-go-free-647_GM1094591345.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_off000031c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C8 23032 bytes
SHA-256: 0f606552693bb61f69fae573dc12d778d94cd45c1f09eb84cd941abf653324f9
font_01_sfnt_off0000659d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659D 19880 bytes
SHA-256: f127c43d4bdcffaa0287b02a96b2e383e7f2b099726a75ad8601ede9e468859f

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