Malicious PDF — malware analysis report

Static analysis result for SHA-256 41af6230d053eba8…

MALICIOUS

PDF

34.5 KB Created: 2021-07-21 04:12:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e0ea56a44f76ce0a423fffc006013aa7 SHA-1: 65f2a20853fa6253cf9cb908c48170efe43712e2 SHA-256: 41af6230d053eba8ae9e3f723091e690d7c346b3444467be503f3ccf2fe04c07
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 0.9955

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/406889139/coin-master-free-link-game-hack PDF link annotation
    • https://www.expertravel.com.gh/wp-content/uploads/fsqm-files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://www.expertravel.com.gh/wp-content/uploads/fsqm-files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.expertravel.com.gh/wp-content/uploads/fsqm-files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.expertravel.com.gh/wp-content/uploads/fsqm-files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.expertravel.com.gh/wp-content/uploads/fsqm-files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.expertravel.com.gh/wp-content/uploads/fsqm-files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://www.expertravel.com.gh/wp-content/uploads/fsqm-files/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • https://www.expertravel.com.gh/wp-content/uploads/fsqm-files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://www.expertravel.com.gh/wp-content/uploads/fsqm-files/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • https://www.expertravel.com.gh/wp-content/uploads/fsqm-files/minecraft-free-ios-2021_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
stream_002_off00002f6e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F6E 23980 bytes
SHA-256: f6df75ff8e3b1f03ad53bbaf3980815dcfb1d7c1ea28bb2145bace9c5240ea87
font_01_sfnt_off00006627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6627 17880 bytes
SHA-256: 5ce88b684446e36e89a0643934549b22fce1d776877bbe9d9a558feafde7429d