Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ef3f8a3228020b…

MALICIOUS

PDF

33.0 KB Created: 2021-07-19 08:41:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 61ef5d1825e9f2fd3e07bf45b78ecabc SHA-1: 9cbd44a88140c4e96e526a74e03afc3b64ae7f7c SHA-256: 02ef3f8a3228020b9c32d07c9e9b3916620a2c2dbd56f9449b9ec4cd3b083f1c
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/406889139/free-coins-on-coin-master-game-hack PDF link annotation
    • http://eurosystemssrl.it/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/hacker-minecraft-song_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_off00002ae3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AE3 23828 bytes
SHA-256: 678e6fdb8916721b2cc07d338ca0bf5ec0526f8a2fbc64539979723eaf588400
font_01_sfnt_off000060c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C5 17712 bytes
SHA-256: 6ea46f87f2167b805a87cbef3ad9b5ecf4d2513d7b8c5fe933be1d22f28e2546

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