Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef75b0cc3e84d77…

MALICIOUS

PDF

40.1 KB Created: 2021-05-22 06:08:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 165c741d8b6c5e7dd8d836d2ca949f03 SHA-1: f485e8bb554d642f587edd3a0a5dfd99212fa168 SHA-256: 6ef75b0cc3e84d7762b015c8e61b3c4dbda87091c495f7fa5b24491d71153447
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that promise free game hacks or currency, a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the lures suggest an attempt to redirect the user to a malicious site, likely for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8010

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/479516143/minecraft-download-free-download-game-hack PDF link annotation
    • http://hilro.co.za/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/pokemon-go-free-quickest-charge-moves_GM1094591345.pdfIn PDF document text
    • http://hilro.co.za/images/get-free-robux-now_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_002_off000034c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34C6 26132 bytes
SHA-256: bb7e65f2154b7b1da8073c7c825076b32f61fd274576dc5a4db144f0090ec76e
font_01_sfnt_off000070df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70DF 3040 bytes
SHA-256: 49181e40569fe532293519460289755d638495957a0075c72518182c67a2f2fe
font_02_sfnt_off00007b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B56 18292 bytes
SHA-256: bcf6477408162be3b167f843e68a68979a000ee483b53557047313ee62fe1046

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