Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd7d860a81b9d4a…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 06:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 22ef2881cb146f31ef98086bee3327c1 SHA-1: a44f6a632007084d7df8888d1d0606c23bd6d585 SHA-256: 1cd7d860a81b9d4aeb5c883496f0868b6beda29fa2abff35f0284431a40ba8fe
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are disguised as game hacks or free currency generators for popular games like Roblox and Minecraft. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a social engineering tactic to trick users into visiting these sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest a phishing or scam attempt, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/is-minecraft-earth-free-game-hack PDF link annotation
    • http://www.sovtigaz.ru/f/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/robux-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/logo-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-making-hacker-smilator_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/como-hackear-a-un-usuario-de-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux-on-roblox-october-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-free-robux-100-virus_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-followers-on-tiktok-app_GM835599320.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/hacks-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-fashion-frenzy-games-free-online_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/robux-hack-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-hack-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-roblox-svg_GM431946152.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_off000030a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A4 23092 bytes
SHA-256: 9e596753b8baea9ec01708330bb26d54829b5f83f5b9448a6ac10fcd9ec28cc8
font_01_sfnt_off00006435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6435 18020 bytes
SHA-256: 96e6e3bf3303e8ffeb20927b63ae2ff56617c6f257b576ebfd215a73ab087f92

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