Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafe86e8f9443245…

MALICIOUS

PDF

38.5 KB Created: 2021-05-21 15:47:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2d5f7fa3e41c4ea94d62e5c8b5e62eca SHA-1: 516b128503f51cd5ccc82e390941a1284d098257 SHA-256: cafe86e8f9443245031bd25d8c6c0d031adbe90506efe8cf5537b8ebb7ad92fb
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 0.8060

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-free-download-ipad-game-hack PDF link annotation
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master_GM406889139.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_off00003449.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3449 24796 bytes
SHA-256: 9aaf5eb56aa876eb19cc5f96290919d7d60c536427a70e9b3e72c3f0a40d8bff
font_01_sfnt_off00006ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD7 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00007477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7477 18464 bytes
SHA-256: 277b1f8f281095ccfe68000cf594913ab5f65ed77c3843aba7451df56ad04c48

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