Malicious PDF — malware analysis report

Static analysis result for SHA-256 562afd86c3f93896…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 20:15:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 981cf3e6c55d66514cfe130c2de7a9b9 SHA-1: af59721ad207881d89dbed97414df9034ed9ee1a SHA-256: 562afd86c3f9389672c89ef526a7d6b7faea02d56305d885bb3906fb3c8df487
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising free Robux and game hacks to lure users. The document body and embedded URLs confirm this lure, directing users to potentially malicious sites like http://netcdn.tw/app/431946152/roblox-group-free-robux-game-hack. No scripts were extracted, but the primary attack pattern involves social engineering through deceptive content to redirect users to malicious infrastructure.

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-group-free-robux-game-hack In PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-roblox-shirt-template-nurse_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-code-thai_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-dungeon-quest-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-hack-someone-on-roblox-2021-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-number_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-hack-life_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/test-all-the-roblox-gears-free-admin_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-can-i-get-minecraft-for-free_GM479516143.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_off00002fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD3 22452 bytes
SHA-256: 01b508dbd614c7d9202043c5d4088399fef4a31d42a790a01266b0a684255ad0
font_01_sfnt_off000061d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D6 18968 bytes
SHA-256: f48b2ae17e84399e3a6b420fde02f8f729f2240ca84fd7cf9c0f4aab3f14a6ff

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