Malicious PDF — malware analysis report

Static analysis result for SHA-256 a791a059d53e99d2…

MALICIOUS

PDF

46.2 KB Created: 2021-05-14 01:08:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a058f2473b9bdc1f85b8db53a83e57d3 SHA-1: ce3d97d4404a33bd67380164aae43e91f31d8aa8 SHA-256: a791a059d53e99d263b018c7b5871edb222e665e99c561a0389fdae73ee3707f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with "game hack" and "free generator" themes. The heuristic firings strongly indicate that the document's purpose is to redirect users to malicious sites, likely to download further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to exploit user interest in game cheats to facilitate a malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/406889139/coin-master-daily-free-cards-game-hack PDF link annotation
    • http://musestravel.com/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://musestravel.com/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://musestravel.com/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://musestravel.com/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://musestravel.com/images/robux-today_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://musestravel.com/images/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://musestravel.com/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://musestravel.com/images/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://musestravel.com/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://musestravel.com/images/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b9c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B9C 24492 bytes
SHA-256: f6111111a048eecb43c3c6b6b4e39a4d9ec502cd1417797a6d500b0872ad7446
font_01_sfnt_off0000840f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x840F 4124 bytes
SHA-256: f638292427b755dd7bf77c43889fd908fca246f613cf97d028c0485efebd01ce
font_02_sfnt_off00009214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9214 18308 bytes
SHA-256: 0f25ff19bbb96414be395e76d71be840701757741be7b1a455de3e70536cac98

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