Malicious PDF — malware analysis report

Static analysis result for SHA-256 7829455c9a6d2adc…

MALICIOUS

PDF

32.9 KB Created: 2021-07-20 01:14:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a2a47d63c9b35bb7ca1a4a27ef1f63d4 SHA-1: 8dccdab55ffdb095b77bd031a044e6f1ed3c7faf SHA-256: 7829455c9a6d2adca866312d5ad0f3ad0a3c93ec876b5697fae28f26c3f1f01a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/minecraft-windows-10-edition-unlock-full-game-free-game-hack PDF link annotation
    • https://w-i-r.de/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • https://w-i-r.de/images/minecraft-com-free_GM479516143.pdfIn PDF document text
    • https://w-i-r.de/images/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • https://w-i-r.de/images/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://w-i-r.de/images/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://w-i-r.de/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://w-i-r.de/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://w-i-r.de/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://w-i-r.de/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-get-free-tiktok-fans_GM835599320.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_off00002be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE9 21592 bytes
SHA-256: 6cca2009ea6c457515ee1c2f708575678d1f4018b920519d1bc6329d802bf357
font_01_sfnt_off00005b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3A 19356 bytes
SHA-256: 614bd227759a0900337b007d73888638d95591a994554acf55d00d578ccef1d0

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