Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec869242f92485d8…

MALICIOUS

PDF

36.9 KB Created: 2021-06-26 03:58:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 93be456e06028b38e24734a2710df6ab SHA-1: a02d8ec77faaaf9453669d6fc43d91b4457d0034 SHA-256: ec869242f92485d80fe6414f98070abd4d900a46e790d96b655eae91230c4bcc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.co/app/431946152/youtube-roblox-free-cops-game-hack. This suggests the document is designed to trick users into visiting potentially harmful websites, likely for phishing or malware distribution. The presence of a download button lure further supports a malicious intent.

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/youtube-roblox-free-cops-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/rbxdemon_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/i-am-hacking-roblox-high-jump_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/comment-avoir-pleins-de-money-sur-roblox-en-jailbreak-cheat_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-insert-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/vehicule-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/list-of-roblox-hackers_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/pokemon-go-for-free-app_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_off000036e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36E6 22968 bytes
SHA-256: b8befe15a7ba7b649c0ece22e9f08f950f795202af874ab52d2be145f1494b61
font_01_sfnt_off00006abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABB 19232 bytes
SHA-256: 288c49a559e0dc391a7060a72cc028c1e1b2e60c0eab0c254caafba7ab855163

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