Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6d64526e797014…

MALICIOUS

PDF

38.6 KB Created: 2021-05-23 08:34:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4444492fdc72660a34085cfc2b9fc25c SHA-1: 891d8c8868fc81b94a19d4622f927ec14355d30e SHA-256: bb6d64526e797014f5788b895bc70bcfd1c9c4a7cd51efa98dd5bf191c238c62
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 0.9476

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/free-minecraft-printables-game-hack PDF link annotation
    • http://news123.it/images/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://news123.it/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://news123.it/images/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://news123.it/images/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://news123.it/images/game-toolbox_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_off000033c7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33C7 29636 bytes
SHA-256: dbb9c8f177f018287f63e1382cd074922e92b5c54e37c75cf1a94de8432f3033
font_01_sfnt_off000076c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C5 17956 bytes
SHA-256: e5df45a09fd76c24ea43a7fa28fc5fe559da15feee3d3577044ff876206ae01e

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